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Finding the Fourth Proportional to 8,651.34, 12,972.90 and 4,487.18

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Solution

The fourth proportional to 8,651.34, 12,972.90 and 4,487.18 is: 6,728.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.34 : 12,972.90 = 4,487.18 : x
  2. Step 2: Convert to fraction form
    8,651.34/12,972.90 = 4,487.18/x
  3. Step 3: Cross multiply
    8,651.34x = 12,972.90 × 4,487.18
  4. Step 4: Simplify right side
    8,651.34x = 58,211,672.56
  5. Step 5: Solve for x
    x = 58,211,672.56/8,651.34
  6. Step 6: Final answer
    x = 6,728.63

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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.