Questions & Answers about Dit is de vierde vraag.
Dit means this.
In Dit is de vierde vraag, it stands alone as a pronoun: This is the fourth question.
The basic contrast is:
- dit = this
- dat = that
When you put the demonstrative directly before a noun, Dutch often uses:
- deze with de-words
- dit with het-words
For example:
- deze vraag = this question
- dit boek = this book
So:
- Dit is de vierde vraag. = This is the fourth question.
- Deze vraag is moeilijk. = This question is difficult.
In your sentence, dit is not placed before vraag, so dit is the correct form.