YOU SAID:

earth is the fourth planet.

INTO JAPANESE

地球は第 4 惑星です。

BACK INTO ENGLISH

The Earth is the fourth planet.

INTO JAPANESE

地球は 4 番目の惑星です。

BACK INTO ENGLISH

Earth is the planet's fourth.

INTO JAPANESE

地球は惑星の 4 番目です。

BACK INTO ENGLISH

Earth is the planet's fourth.