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Finding the Fourth Proportional to 8,649.20, 12,952.20 and 5,711.60

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Solution

The fourth proportional to 8,649.20, 12,952.20 and 5,711.60 is: 8,553.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.20 : 12,952.20 = 5,711.60 : x
  2. Step 2: Convert to fraction form
    8,649.20/12,952.20 = 5,711.60/x
  3. Step 3: Cross multiply
    8,649.20x = 12,952.20 × 5,711.60
  4. Step 4: Simplify right side
    8,649.20x = 73,977,785.52
  5. Step 5: Solve for x
    x = 73,977,785.52/8,649.20
  6. Step 6: Final answer
    x = 8,553.14

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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.