Home / 20,778.28-31,174.68-9,092.38

Finding the Fourth Proportional to 20,778.28, 31,174.68 and 9,092.38

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Solution

The fourth proportional to 20,778.28, 31,174.68 and 9,092.38 is: 13,641.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.28 : 31,174.68 = 9,092.38 : x
  2. Step 2: Convert to fraction form
    20,778.28/31,174.68 = 9,092.38/x
  3. Step 3: Cross multiply
    20,778.28x = 31,174.68 × 9,092.38
  4. Step 4: Simplify right side
    20,778.28x = 283,452,036.94
  5. Step 5: Solve for x
    x = 283,452,036.94/20,778.28
  6. Step 6: Final answer
    x = 13,641.75

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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.