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Finding the Fourth Proportional to 38,243.64, 57,380.17 and 18,520.68

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Solution

The fourth proportional to 38,243.64, 57,380.17 and 18,520.68 is: 27,788.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,243.64 : 57,380.17 = 18,520.68 : x
  2. Step 2: Convert to fraction form
    38,243.64/57,380.17 = 18,520.68/x
  3. Step 3: Cross multiply
    38,243.64x = 57,380.17 × 18,520.68
  4. Step 4: Simplify right side
    38,243.64x = 1,062,719,766.92
  5. Step 5: Solve for x
    x = 1,062,719,766.92/38,243.64
  6. Step 6: Final answer
    x = 27,788.14

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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.