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Finding the Fourth Proportional to 28,372.75, 42,565.95 and 8,650.08

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Solution

The fourth proportional to 28,372.75, 42,565.95 and 8,650.08 is: 12,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372.75 : 42,565.95 = 8,650.08 : x
  2. Step 2: Convert to fraction form
    28,372.75/42,565.95 = 8,650.08/x
  3. Step 3: Cross multiply
    28,372.75x = 42,565.95 × 8,650.08
  4. Step 4: Simplify right side
    28,372.75x = 368,198,872.78
  5. Step 5: Solve for x
    x = 368,198,872.78/28,372.75
  6. Step 6: Final answer
    x = 12,977.20

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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.