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Finding the Fourth Proportional to 15,013.59, 20,720.66 and 8,724.75

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Solution

The fourth proportional to 15,013.59, 20,720.66 and 8,724.75 is: 12,041.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.59 : 20,720.66 = 8,724.75 : x
  2. Step 2: Convert to fraction form
    15,013.59/20,720.66 = 8,724.75/x
  3. Step 3: Cross multiply
    15,013.59x = 20,720.66 × 8,724.75
  4. Step 4: Simplify right side
    15,013.59x = 180,782,534.71
  5. Step 5: Solve for x
    x = 180,782,534.71/15,013.59
  6. Step 6: Final answer
    x = 12,041.26

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