If 9.8 : 14.7 :: 15 : x, find the value of x.

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 3)
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  1. 22.5
  2. 23.2
  3. 21.7
  4. 19.9

Answer (Detailed Solution Below)

Option 1 : 22.5
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Detailed Solution

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Given:

9.8 : 14.7 :: 15 : x

Formula used:

If a : b :: c : d, then a/b = c/d.

Calculation:

Using a/b = c/d, we have:

⇒ 9.8/14.7 = 15/x

⇒ x = (14.7 × 15) / 9.8

⇒ x = 220.5 / 9.8

⇒ x = 22.5

∴ The correct answer is option (1).

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