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Finding the Fourth Proportional to 28,092.75, 42,145.20 and 8,372.88

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Solution

The fourth proportional to 28,092.75, 42,145.20 and 8,372.88 is: 12,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,092.75 : 42,145.20 = 8,372.88 : x
  2. Step 2: Convert to fraction form
    28,092.75/42,145.20 = 8,372.88/x
  3. Step 3: Cross multiply
    28,092.75x = 42,145.20 × 8,372.88
  4. Step 4: Simplify right side
    28,092.75x = 352,876,702.18
  5. Step 5: Solve for x
    x = 352,876,702.18/28,092.75
  6. Step 6: Final answer
    x = 12,561.13

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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.