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Finding the Fourth Proportional to 25,425.92, 38,129.52 and 8,781.68

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Solution

The fourth proportional to 25,425.92, 38,129.52 and 8,781.68 is: 13,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,425.92 : 38,129.52 = 8,781.68 : x
  2. Step 2: Convert to fraction form
    25,425.92/38,129.52 = 8,781.68/x
  3. Step 3: Cross multiply
    25,425.92x = 38,129.52 × 8,781.68
  4. Step 4: Simplify right side
    25,425.92x = 334,841,243.19
  5. Step 5: Solve for x
    x = 334,841,243.19/25,425.92
  6. Step 6: Final answer
    x = 13,169.29

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1.5x scale

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.