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Finding the Fourth Proportional to 8,671.59, 13,005.92 and 3,123.90

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Solution

The fourth proportional to 8,671.59, 13,005.92 and 3,123.90 is: 4,685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.59 : 13,005.92 = 3,123.90 : x
  2. Step 2: Convert to fraction form
    8,671.59/13,005.92 = 3,123.90/x
  3. Step 3: Cross multiply
    8,671.59x = 13,005.92 × 3,123.90
  4. Step 4: Simplify right side
    8,671.59x = 40,629,177.87
  5. Step 5: Solve for x
    x = 40,629,177.87/8,671.59
  6. Step 6: Final answer
    x = 4,685.32

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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.