Ratio, Proportion

Quantitative Aptitude (Pb Patwari)

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The third proportional to 9 and 12 is ?

13

16

19

21

Explanation:

Let the third proportion to 9 & 12 be 'x'.
=> 9:12 = 12 :p
=> p = 12x12/9 = 16

By: MIRZA SADDAM HUSSAIN

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