Home / 20,718.22-28,591.42-11,286.76

Finding the Fourth Proportional to 20,718.22, 28,591.42 and 11,286.76

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Solution

The fourth proportional to 20,718.22, 28,591.42 and 11,286.76 is: 15,575.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.22 : 28,591.42 = 11,286.76 : x
  2. Step 2: Convert to fraction form
    20,718.22/28,591.42 = 11,286.76/x
  3. Step 3: Cross multiply
    20,718.22x = 28,591.42 × 11,286.76
  4. Step 4: Simplify right side
    20,718.22x = 322,704,495.60
  5. Step 5: Solve for x
    x = 322,704,495.60/20,718.22
  6. Step 6: Final answer
    x = 15,575.88

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Half scale
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Double scale
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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.