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Finding the Fourth Proportional to 8,691.44, 12,000.76 and 5,338.85

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Solution

The fourth proportional to 8,691.44, 12,000.76 and 5,338.85 is: 7,371.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.44 : 12,000.76 = 5,338.85 : x
  2. Step 2: Convert to fraction form
    8,691.44/12,000.76 = 5,338.85/x
  3. Step 3: Cross multiply
    8,691.44x = 12,000.76 × 5,338.85
  4. Step 4: Simplify right side
    8,691.44x = 64,070,184.18
  5. Step 5: Solve for x
    x = 64,070,184.18/8,691.44
  6. Step 6: Final answer
    x = 7,371.65

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.