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Finding the Fourth Proportional to 25,490.92, 38,221.68 and 9,890.32

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Solution

The fourth proportional to 25,490.92, 38,221.68 and 9,890.32 is: 14,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,490.92 : 38,221.68 = 9,890.32 : x
  2. Step 2: Convert to fraction form
    25,490.92/38,221.68 = 9,890.32/x
  3. Step 3: Cross multiply
    25,490.92x = 38,221.68 × 9,890.32
  4. Step 4: Simplify right side
    25,490.92x = 378,024,646.14
  5. Step 5: Solve for x
    x = 378,024,646.14/25,490.92
  6. Step 6: Final answer
    x = 14,829.78

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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.