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Finding the Fourth Proportional to 8,691,781.70, 13,037,672.55 and 5,479,516.10

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Solution

The fourth proportional to 8,691,781.70, 13,037,672.55 and 5,479,516.10 is: 8,219,274.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691,781.70 : 13,037,672.55 = 5,479,516.10 : x
  2. Step 2: Convert to fraction form
    8,691,781.70/13,037,672.55 = 5,479,516.10/x
  3. Step 3: Cross multiply
    8,691,781.70x = 13,037,672.55 × 5,479,516.10
  4. Step 4: Simplify right side
    8,691,781.70x = 71,440,136,644,253.05
  5. Step 5: Solve for x
    x = 71,440,136,644,253.05/8,691,781.70
  6. Step 6: Final answer
    x = 8,219,274.15

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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.