Home / 20,447.28-28,217.25-11,494.80

Finding the Fourth Proportional to 20,447.28, 28,217.25 and 11,494.80

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Solution

The fourth proportional to 20,447.28, 28,217.25 and 11,494.80 is: 15,862.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.28 : 28,217.25 = 11,494.80 : x
  2. Step 2: Convert to fraction form
    20,447.28/28,217.25 = 11,494.80/x
  3. Step 3: Cross multiply
    20,447.28x = 28,217.25 × 11,494.80
  4. Step 4: Simplify right side
    20,447.28x = 324,351,645.30
  5. Step 5: Solve for x
    x = 324,351,645.30/20,447.28
  6. Step 6: Final answer
    x = 15,862.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.