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Finding the Fourth Proportional to 25,988.52, 38,991.84 and 8,221.92

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Solution

The fourth proportional to 25,988.52, 38,991.84 and 8,221.92 is: 12,335.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,988.52 : 38,991.84 = 8,221.92 : x
  2. Step 2: Convert to fraction form
    25,988.52/38,991.84 = 8,221.92/x
  3. Step 3: Cross multiply
    25,988.52x = 38,991.84 × 8,221.92
  4. Step 4: Simplify right side
    25,988.52x = 320,587,789.13
  5. Step 5: Solve for x
    x = 320,587,789.13/25,988.52
  6. Step 6: Final answer
    x = 12,335.75

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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.