Question

The third proportional to 9 and 15 is:
1. 18
2. 36
3. 27
4. 25

Answer 1

Correct Answer - Option 4 : 25

Given:

We have to obtain the third proportional to 9 and 15

Concept Used:

Concept of ratio and proportion

Calculation:

Let, the third proportional be x

Then,

9 : 15 : : 15 : x

⇒ 9/15 = 15/x

⇒ x = (15 × 15) / 9

⇒ x = 25

∴ The required third proportional to 9 and 15 is 25.