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Finding the Fourth Proportional to 8,565.43, 12,843.27 and 5,105.11

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Solution

The fourth proportional to 8,565.43, 12,843.27 and 5,105.11 is: 7,654.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,565.43 : 12,843.27 = 5,105.11 : x
  2. Step 2: Convert to fraction form
    8,565.43/12,843.27 = 5,105.11/x
  3. Step 3: Cross multiply
    8,565.43x = 12,843.27 × 5,105.11
  4. Step 4: Simplify right side
    8,565.43x = 65,566,306.11
  5. Step 5: Solve for x
    x = 65,566,306.11/8,565.43
  6. Step 6: Final answer
    x = 7,654.76

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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.