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Finding the Fourth Proportional to 8,665.28, 12,987.84 and 3,472.64

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Solution

The fourth proportional to 8,665.28, 12,987.84 and 3,472.64 is: 5,204.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.28 : 12,987.84 = 3,472.64 : x
  2. Step 2: Convert to fraction form
    8,665.28/12,987.84 = 3,472.64/x
  3. Step 3: Cross multiply
    8,665.28x = 12,987.84 × 3,472.64
  4. Step 4: Simplify right side
    8,665.28x = 45,102,092.70
  5. Step 5: Solve for x
    x = 45,102,092.70/8,665.28
  6. Step 6: Final answer
    x = 5,204.92

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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.