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Finding the Fourth Proportional to 8,649.39, 12,978.18 and 4,487.16

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Solution

The fourth proportional to 8,649.39, 12,978.18 and 4,487.16 is: 6,732.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.39 : 12,978.18 = 4,487.16 : x
  2. Step 2: Convert to fraction form
    8,649.39/12,978.18 = 4,487.16/x
  3. Step 3: Cross multiply
    8,649.39x = 12,978.18 × 4,487.16
  4. Step 4: Simplify right side
    8,649.39x = 58,235,170.17
  5. Step 5: Solve for x
    x = 58,235,170.17/8,649.39
  6. Step 6: Final answer
    x = 6,732.86

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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.