Home / 20,801.88-31,202.82-9,115.20

Finding the Fourth Proportional to 20,801.88, 31,202.82 and 9,115.20

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Solution

The fourth proportional to 20,801.88, 31,202.82 and 9,115.20 is: 13,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.88 : 31,202.82 = 9,115.20 : x
  2. Step 2: Convert to fraction form
    20,801.88/31,202.82 = 9,115.20/x
  3. Step 3: Cross multiply
    20,801.88x = 31,202.82 × 9,115.20
  4. Step 4: Simplify right side
    20,801.88x = 284,419,944.86
  5. Step 5: Solve for x
    x = 284,419,944.86/20,801.88
  6. Step 6: Final answer
    x = 13,672.80

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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.