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Finding the Fourth Proportional to 18,800.30, 28,200.45 and 15,517.10

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Solution

The fourth proportional to 18,800.30, 28,200.45 and 15,517.10 is: 23,275.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.30 : 28,200.45 = 15,517.10 : x
  2. Step 2: Convert to fraction form
    18,800.30/28,200.45 = 15,517.10/x
  3. Step 3: Cross multiply
    18,800.30x = 28,200.45 × 15,517.10
  4. Step 4: Simplify right side
    18,800.30x = 437,589,202.70
  5. Step 5: Solve for x
    x = 437,589,202.70/18,800.30
  6. Step 6: Final answer
    x = 23,275.65

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Double scale
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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.