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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/4 = 9/12
    x=(9*4)/12
    x= 3

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