The third proportional to 9 and 12 is 10.5 - Vidyadip

Question

The third proportional to 9 and 12 is 10.5

✓

Answer

False.
Solution:
Suppose that the third proportional is x.
Then, 9: 12 :: 12 : x
⇒ 9x = 144 (Product of extremes = Product of means)
⇒ x = 16

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