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Finding the Fourth Proportional to 8,451.32, 12,658.92 and 6,862.88

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Solution

The fourth proportional to 8,451.32, 12,658.92 and 6,862.88 is: 10,279.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,451.32 : 12,658.92 = 6,862.88 : x
  2. Step 2: Convert to fraction form
    8,451.32/12,658.92 = 6,862.88/x
  3. Step 3: Cross multiply
    8,451.32x = 12,658.92 × 6,862.88
  4. Step 4: Simplify right side
    8,451.32x = 86,876,648.89
  5. Step 5: Solve for x
    x = 86,876,648.89/8,451.32
  6. Step 6: Final answer
    x = 10,279.65

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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.