Find the fourth proportional to 6, 9, and 15.
22.5
If x is the fourth proportional to 6, 9 and 15, then 6 : 9 :: 15 : x, i.e. 6/9 = 15/x.
So x = (9 x 15) / 6 = 135 / 6 = 22.5.
Hence, the answer is 22.5.
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Important Questions from Fourth Proportional
The fourth proportional to the numbers 5, 6 and 8 is:
What is the fourth proportional to the numbers 50, 35 and 20?
If 162 ∶ x ∶∶ x ∶ 338, find the positive value of x.
The fourth proportional of 10, 15 and 30 is:
The fourth proportional to 3, 12, 14 is:
