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Finding the Fourth Proportional to 8,655.30, 12,981.24 and 4,269.96

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Solution

The fourth proportional to 8,655.30, 12,981.24 and 4,269.96 is: 6,404.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.30 : 12,981.24 = 4,269.96 : x
  2. Step 2: Convert to fraction form
    8,655.30/12,981.24 = 4,269.96/x
  3. Step 3: Cross multiply
    8,655.30x = 12,981.24 × 4,269.96
  4. Step 4: Simplify right side
    8,655.30x = 55,429,375.55
  5. Step 5: Solve for x
    x = 55,429,375.55/8,655.30
  6. Step 6: Final answer
    x = 6,404.10

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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.