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Easy

Question

Find x, if x, 4, 9, 12 are in proportion.

  1. 4
  2. 3
  3. 5
  4. 6

The correct answer is: 3


    As x, 4, 9, 12 are in proportion
    x : 4 :: 9 : 12
    x over 4 = 9 over 12
    x = fraction numerator left parenthesis 9 cross times 4 right parenthesis over denominator 12 end fraction
    x= 3

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