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Finding the Fourth Proportional to 8,472.52, 12,681.18 and 7,664.20

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Solution

The fourth proportional to 8,472.52, 12,681.18 and 7,664.20 is: 11,471.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.52 : 12,681.18 = 7,664.20 : x
  2. Step 2: Convert to fraction form
    8,472.52/12,681.18 = 7,664.20/x
  3. Step 3: Cross multiply
    8,472.52x = 12,681.18 × 7,664.20
  4. Step 4: Simplify right side
    8,472.52x = 97,191,099.76
  5. Step 5: Solve for x
    x = 97,191,099.76/8,472.52
  6. Step 6: Final answer
    x = 11,471.33

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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.