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Finding the Fourth Proportional to 18,551.88, 27,781.65 and 12,979.15

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Solution

The fourth proportional to 18,551.88, 27,781.65 and 12,979.15 is: 19,436.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,551.88 : 27,781.65 = 12,979.15 : x
  2. Step 2: Convert to fraction form
    18,551.88/27,781.65 = 12,979.15/x
  3. Step 3: Cross multiply
    18,551.88x = 27,781.65 × 12,979.15
  4. Step 4: Simplify right side
    18,551.88x = 360,582,133.14
  5. Step 5: Solve for x
    x = 360,582,133.14/18,551.88
  6. Step 6: Final answer
    x = 19,436.42

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