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      Question

      Find the fourth proportion of 3, 7 and

      15.
      A 21 Correct Answer Incorrect Answer
      B 15 Correct Answer Incorrect Answer
      C 35 Correct Answer Incorrect Answer
      D 49 Correct Answer Incorrect Answer

      Solution

      Let the fourth proportional be 'x'

      So, (3/7) = (15/x)

      So, x = 15 X (7/3) = 35

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