Forth or Fourth: Meaning and Usage Explained

It is easy to confuse forth and fourth because they look and sound very similar, but they have completely different meanings. One is related to movement or direction, while the other is connected with the number four and position in a sequence. This distinction becomes especially important in expressions such as “back and forth” and “Fourth of July.” The good news is that a simple rule can help you choose the right word almost every time.

Forth or Fourth: What’s the Difference?

The easiest way to distinguish the two is to connect each word with a related idea:

• Fourth → four / 4th
• Forth → forward / onward

Fourth is an ordinal number. It identifies something that comes after the third and before the fifth.

She finished fourth in the competition.

Here, fourth means she finished in position 4.

Forth, on the other hand, usually refers to movement forward or onward.

The travelers went forth into the forest.

Here, forth has nothing to do with the number four. It means moving onward or forward.

Word	Meaning	Example
forth	forward, onward, outward	They marched forth.
fourth	number 4 in sequence	She came fourth.

So, if you can replace the word with “4th,” choose fourth. If you can replace it with “forward” or “onward,” forth is usually the right choice.

What Does “Fourth” Mean?

Fourth is an ordinal number. It describes the position of something in a sequence.

The sequence is:

first → second → third → fourth → fifth

For example:

• This is my fourth visit to London.
• He lives on the fourth floor.
• She won fourth place.
• The fourth chapter explains the main idea.
• My birthday is on the fourth of June.

The word can also refer to one of four equal parts.

He ate a fourth of the pizza.

In this sentence, a fourth means one-quarter.

Fourth in dates

You will frequently see fourth when referring to the fourth day of a month.

The meeting is scheduled for the fourth of September.

The same principle explains the familiar American holiday name Fourth of July.

What Does “Forth” Mean?

Forth is generally an adverb associated with movement or progression. It can mean forward, onward, outward, or into view, depending on the context.

Examples include:

• The explorers moved forth.
• She stepped forth to accept the award.
• The group set forth before sunrise.
• The flowers began to spring forth after the rain.
• The new evidence brought the truth forth.

It is also common in established expressions.

Common expressions with “forth”

Some useful examples are:

• back and forth
• go forth
• set forth
• bring forth
• put forth
• come forth
• and so forth
• from that day forth

In these expressions, forth does not mean “fourth.”

Is It “Back and Forth” or “Back and Fourth”?

The correct phrase is:

back and forth ✅

back and fourth ❌

The expression back and forth describes repeated movement, communication, or change from one direction or side to another.

Examples:

The children ran back and forth across the garden.

The two teams exchanged ideas back and forth.

He walked back and forth while waiting for the phone call.

The discussion went back and forth for nearly an hour.

Why is forth correct? In this expression, it has the sense of forward or movement away from one point.

A useful mental substitution is:

back and forth → back and forward

The phrase “back and fourth” is a spelling error when this meaning is intended.

Forth or Fourth of July?

The correct expression is:

Fourth of July ✅

Not:

Forth of July ❌

The word is fourth because July 4 is the fourth day of the month.

For example:

We are having a barbecue for the Fourth of July.

The Fourth of July is celebrated on July 4 in the United States.

You may also see the holiday written as July Fourth.

The important point is that fourth is being used as an ordinal number. You can think of it as:

July 4 → July fourth

That makes this a completely different use from forth in “back and forth.”

When Should You Use Each Word?

A simple comparison makes the distinction easier to remember.

Use “fourth” for number or position

Use fourth when something is number 4 or occupies the fourth position.

This is the fourth question.

She finished fourth.

We are on the fourth floor.

He was the fourth person to arrive.

The fourth episode was my favorite.

Use “forth” for movement or progression

Use forth when the meaning involves moving forward or onward, particularly in established expressions.

They marched forth.

The soldiers went forth into battle.

She stepped forth confidently.

We went back and forth about the decision.

The information was set forth in the report.

Examples: Correct vs. Incorrect

Seeing the words side by side can make the difference clearer.

Number and position

Correct:

He came fourth in the race.

Incorrect:

He came forth in the race.

The intended meaning is position 4, so fourth is required.

Repeated movement

Correct:

The pendulum swung back and forth.

Incorrect:

The pendulum swung back and fourth.

The expression describes movement, so forth is correct.

The American holiday

Correct:

We are celebrating the Fourth of July.

Incorrect:

We are celebrating the Forth of July.

The date is July 4, so the ordinal number fourth is required.

Onward movement

Correct:

The travelers continued forth.

Incorrect:

The travelers continued fourth.

The intended meaning is onward or forward, so forth is appropriate.

A sequence

Correct:

Read the fourth paragraph carefully.

Incorrect:

Read the forth paragraph carefully.

The paragraph is number 4, so fourth is correct.

Why Are “Forth” and “Fourth” Confused?

The main reason is their similar spelling and pronunciation. Both words sound very similar in many varieties of English, making them easy to mix up when writing.

The confusion is particularly common in fixed phrases. Someone may know the phrase “back and forth” by sound but mistakenly write “back and fourth.” Similarly, someone familiar with July 4 may accidentally write “Forth of July.”

The meanings, however, provide a reliable way to separate them.

Think about the context:

• Is the word about 4 or position number 4? → fourth
• Is it about moving forward or onward? → forth

An Easy Way to Remember the Difference

The simplest memory trick is:

FOUR → FOURTH

The word fourth contains four.

four → fourth

If the sentence is about the number 4, position 4, or one-quarter, choose fourth.

FORTH → FORWARD

Associate forth with forward.

forth → forward

If the word describes going onward or appears in back and forth, use forth.

A few examples make the rule easy:

• fourth floor → floor 4
• fourth place → position 4
• Fourth of July → July 4
• back and forth → back and forward
• go forth → go forward
• set forth → put forward or present

Common Mistakes to Avoid

1. “Back and fourth”

This is one of the most common mistakes.

❌ We went back and fourth.

✅ We went back and forth.

2. “Forth of July”

When referring to the American holiday, use fourth.

❌ Happy Forth of July!

✅ Happy Fourth of July!

3. “Fourth and forth”

Do not assume that the words are alternative spellings. They have different meanings.

The fourth child stepped forth.

Both words can correctly appear in the same sentence because they perform different jobs.

4. “And so fourth”

The established expression is:

✅ and so forth

It means “and so on” or indicates that a list continues.

We discussed food, transportation, accommodation, and so forth.

5. “Set fourth”

The expression is:

✅ set forth

For example:

The report sets forth the company’s proposed changes.

Here, forth is part of a phrase meaning to present or state something.

Forth or Fourth: Quick Reference

Situation	Correct word	Example
Position 4	fourth	She finished fourth.
Number 4	fourth	The fourth question
July 4	fourth	Fourth of July
Fourth floor	fourth	The fourth floor
Forward movement	forth	Go forth
Repeated movement	forth	Back and forth
Continuing a list	forth	And so forth
Presenting something	forth	Set forth the facts

Frequently Asked Questions

Is “forth” a real word?

Yes. Forth is a standard English word. It can mean forward or onward and occurs in several established expressions, including back and forth, set forth, and and so forth.

Is “fourth” the correct spelling for number four?

Yes. Fourth is the ordinal form associated with the number four. It describes something that comes in position four, such as fourth place, fourth grade, or the fourth chapter.

Is it “back and forth” or “back and fourth”?

The correct expression is back and forth. It describes movement, communication, or changes between two directions or positions. Back and fourth is incorrect when this meaning is intended.

Is it “Forth of July” or “Fourth of July”?

The correct expression is Fourth of July. The holiday is observed on July 4, so fourth is the appropriate ordinal number.

How can I remember forth vs. fourth?

Use the simple association FOUR → FOURTH and FORTH → FORWARD. If the word means number four or position four, choose fourth. If it relates to moving forward or onward, choose forth.

Final Verdict: Forth or Fourth?

Both forth and fourth are correct English words, but they are not interchangeable. Fourth relates to the number four or the fourth position, while forth generally means forward or onward. Remember “four → fourth” and “forth → forward,” and phrases such as “back and forth” and “Fourth of July” become much easier to spell correctly. For more clear explanations of confusing English words, Grammarifyr helps you know the difference and use the right words.

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