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Finding the Fourth Proportional to 8,651.32, 12,981.08 and 4,489.11

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Solution

The fourth proportional to 8,651.32, 12,981.08 and 4,489.11 is: 6,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.32 : 12,981.08 = 4,489.11 : x
  2. Step 2: Convert to fraction form
    8,651.32/12,981.08 = 4,489.11/x
  3. Step 3: Cross multiply
    8,651.32x = 12,981.08 × 4,489.11
  4. Step 4: Simplify right side
    8,651.32x = 58,273,507.26
  5. Step 5: Solve for x
    x = 58,273,507.26/8,651.32
  6. Step 6: Final answer
    x = 6,735.80

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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.