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Finding the Fourth Proportional to 18,819.82, 28,229.74 and 5,672.19

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Solution

The fourth proportional to 18,819.82, 28,229.74 and 5,672.19 is: 8,508.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.82 : 28,229.74 = 5,672.19 : x
  2. Step 2: Convert to fraction form
    18,819.82/28,229.74 = 5,672.19/x
  3. Step 3: Cross multiply
    18,819.82x = 28,229.74 × 5,672.19
  4. Step 4: Simplify right side
    18,819.82x = 160,124,318.38
  5. Step 5: Solve for x
    x = 160,124,318.38/18,819.82
  6. Step 6: Final answer
    x = 8,508.28

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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.