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Finding the Fourth Proportional to 22,752.52, 34,128.87 and 12,429.88

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Solution

The fourth proportional to 22,752.52, 34,128.87 and 12,429.88 is: 18,644.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,752.52 : 34,128.87 = 12,429.88 : x
  2. Step 2: Convert to fraction form
    22,752.52/34,128.87 = 12,429.88/x
  3. Step 3: Cross multiply
    22,752.52x = 34,128.87 × 12,429.88
  4. Step 4: Simplify right side
    22,752.52x = 424,217,758.64
  5. Step 5: Solve for x
    x = 424,217,758.64/22,752.52
  6. Step 6: Final answer
    x = 18,644.87

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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.