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Finding the Fourth Proportional to 18,773.20, 28,134.88 and 15,659.30

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Solution

The fourth proportional to 18,773.20, 28,134.88 and 15,659.30 is: 23,468.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.20 : 28,134.88 = 15,659.30 : x
  2. Step 2: Convert to fraction form
    18,773.20/28,134.88 = 15,659.30/x
  3. Step 3: Cross multiply
    18,773.20x = 28,134.88 × 15,659.30
  4. Step 4: Simplify right side
    18,773.20x = 440,572,635.87
  5. Step 5: Solve for x
    x = 440,572,635.87/18,773.20
  6. Step 6: Final answer
    x = 23,468.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.