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Finding the Fourth Proportional to 8,563.92, 12,761.21 and 7,691.80

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Solution

The fourth proportional to 8,563.92, 12,761.21 and 7,691.80 is: 11,461.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,563.92 : 12,761.21 = 7,691.80 : x
  2. Step 2: Convert to fraction form
    8,563.92/12,761.21 = 7,691.80/x
  3. Step 3: Cross multiply
    8,563.92x = 12,761.21 × 7,691.80
  4. Step 4: Simplify right side
    8,563.92x = 98,156,675.08
  5. Step 5: Solve for x
    x = 98,156,675.08/8,563.92
  6. Step 6: Final answer
    x = 11,461.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.