Calculate the 3rd Proportional to 15 and 30.

  1. 55
  2. 15
  3. 65
  4. 60
kailashkumar Default Asked on 25th July 2015 in Maths.
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1 Answer(s)

Answer: (4) 60
Explanation:-
Let be the third proportion is X
Then, 15 : 30 :: 30 : X
Or,
15/30 = 30/X
X = 30 x 30/15
X = 60
Hence, the third proportion is 60.

Anurag Mishra Professor Answered on 25th July 2015.
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