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Finding the Fourth Proportional to 8,658.60, 12,972.54 and 5,909.16

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Solution

The fourth proportional to 8,658.60, 12,972.54 and 5,909.16 is: 8,853.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.60 : 12,972.54 = 5,909.16 : x
  2. Step 2: Convert to fraction form
    8,658.60/12,972.54 = 5,909.16/x
  3. Step 3: Cross multiply
    8,658.60x = 12,972.54 × 5,909.16
  4. Step 4: Simplify right side
    8,658.60x = 76,656,814.47
  5. Step 5: Solve for x
    x = 76,656,814.47/8,658.60
  6. Step 6: Final answer
    x = 8,853.26

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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.