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Finding the Fourth Proportional to 15,174.88, 20,932.96 and 9,517.92

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Solution

The fourth proportional to 15,174.88, 20,932.96 and 9,517.92 is: 13,129.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174.88 : 20,932.96 = 9,517.92 : x
  2. Step 2: Convert to fraction form
    15,174.88/20,932.96 = 9,517.92/x
  3. Step 3: Cross multiply
    15,174.88x = 20,932.96 × 9,517.92
  4. Step 4: Simplify right side
    15,174.88x = 199,238,238.64
  5. Step 5: Solve for x
    x = 199,238,238.64/15,174.88
  6. Step 6: Final answer
    x = 13,129.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.