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      Question

      Find the fourth proportion of (k + 3), (2k - 6), and (4k -

      9). (Note: 'k' is the smallest two-digit prime number.)
      A 36 Correct Answer Incorrect Answer
      B 38 Correct Answer Incorrect Answer
      C 40 Correct Answer Incorrect Answer
      D 42 Correct Answer Incorrect Answer

      Solution

      k = 11
      k + 3 = 14
      2k - 6 = 22 - 6 = 16
      4k - 9 = 44 - 9 = 35
      14 : 16 :: 35 : m
      14m = 16 ├Ч 35 = 560
      m = 560 ├╖ 14 = 40

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