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Finding the Fourth Proportional to 8,458.71, 12,691.07 and 3,778.29

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Solution

The fourth proportional to 8,458.71, 12,691.07 and 3,778.29 is: 5,668.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.71 : 12,691.07 = 3,778.29 : x
  2. Step 2: Convert to fraction form
    8,458.71/12,691.07 = 3,778.29/x
  3. Step 3: Cross multiply
    8,458.71x = 12,691.07 × 3,778.29
  4. Step 4: Simplify right side
    8,458.71x = 47,950,523.98
  5. Step 5: Solve for x
    x = 47,950,523.98/8,458.71
  6. Step 6: Final answer
    x = 5,668.78

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1.5x scale

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.