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Finding the Fourth Proportional to 13,720.79, 18,935.43 and 7,752.71

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Solution

The fourth proportional to 13,720.79, 18,935.43 and 7,752.71 is: 10,699.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.79 : 18,935.43 = 7,752.71 : x
  2. Step 2: Convert to fraction form
    13,720.79/18,935.43 = 7,752.71/x
  3. Step 3: Cross multiply
    13,720.79x = 18,935.43 × 7,752.71
  4. Step 4: Simplify right side
    13,720.79x = 146,800,897.52
  5. Step 5: Solve for x
    x = 146,800,897.52/13,720.79
  6. Step 6: Final answer
    x = 10,699.16

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