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Finding the Fourth Proportional to 8,255.80, 12,383.70 and 5,487.90

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Solution

The fourth proportional to 8,255.80, 12,383.70 and 5,487.90 is: 8,231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,255.80 : 12,383.70 = 5,487.90 : x
  2. Step 2: Convert to fraction form
    8,255.80/12,383.70 = 5,487.90/x
  3. Step 3: Cross multiply
    8,255.80x = 12,383.70 × 5,487.90
  4. Step 4: Simplify right side
    8,255.80x = 67,960,507.23
  5. Step 5: Solve for x
    x = 67,960,507.23/8,255.80
  6. Step 6: Final answer
    x = 8,231.85

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Similar ratio
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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.