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Finding the Fourth Proportional to 17,151.30, 25,715.85 and 7,287.90

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Solution

The fourth proportional to 17,151.30, 25,715.85 and 7,287.90 is: 10,927.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,151.30 : 25,715.85 = 7,287.90 : x
  2. Step 2: Convert to fraction form
    17,151.30/25,715.85 = 7,287.90/x
  3. Step 3: Cross multiply
    17,151.30x = 25,715.85 × 7,287.90
  4. Step 4: Simplify right side
    17,151.30x = 187,414,543.22
  5. Step 5: Solve for x
    x = 187,414,543.22/17,151.30
  6. Step 6: Final answer
    x = 10,927.13

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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.