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What is the fourth proportional to 3, 7 and 15?1. 302. 453. 354. 25 |
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Answer» Correct Answer - Option 3 : 35 Given : let x be the fourth proportional of 3,7 and 15 then 3 : 7 :: 15 : x Concept Used: If a : b :: c : d then ad = bc d = bc/a Calculation: 3/7 = 15/x ⇒ x = (15 × 7) / 3 ⇒ x = 35 ∴ Fourth proportional of 3, 7 and 15 is 35
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