20
The fourth proportional to 3, 4 and 15 is?
- A20
- B17
- C18
- D15
Answer not set
Discussion 1
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CCommunity
Let x be the fourth proportional to 3,4 and 15
⇒ 3 ? 4 ?? 15 ? x
Since, Product of the extremes = Product of the means
∴ 3x = 15 x 4
∴ x = 20
⇒ 3 ? 4 ?? 15 ? x
Since, Product of the extremes = Product of the means
∴ 3x = 15 x 4
∴ x = 20