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Finding the Fourth Proportional to 18,561.87, 27,845.33 and 5,414.13

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Solution

The fourth proportional to 18,561.87, 27,845.33 and 5,414.13 is: 8,121.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.87 : 27,845.33 = 5,414.13 : x
  2. Step 2: Convert to fraction form
    18,561.87/27,845.33 = 5,414.13/x
  3. Step 3: Cross multiply
    18,561.87x = 27,845.33 × 5,414.13
  4. Step 4: Simplify right side
    18,561.87x = 150,758,209.44
  5. Step 5: Solve for x
    x = 150,758,209.44/18,561.87
  6. Step 6: Final answer
    x = 8,121.93

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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.