Answer:
1 : 3
Explanation:
We are given an equation 2 × 9 = 3 × 6
So, we have to write a proportion for this equation performing all changes.
Now, we write the equation as follows:
2 × 9 = 3 × 6
⇒

Therefore, this is the proportion for this equation and this is 2 : 6 ≡ 3 : 9 ≡ 1 : 3 (Answer)