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Finding the Fourth Proportional to 38,481.80, 57,728.10 and 12,183.80

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Solution

The fourth proportional to 38,481.80, 57,728.10 and 12,183.80 is: 18,277.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,481.80 : 57,728.10 = 12,183.80 : x
  2. Step 2: Convert to fraction form
    38,481.80/57,728.10 = 12,183.80/x
  3. Step 3: Cross multiply
    38,481.80x = 57,728.10 × 12,183.80
  4. Step 4: Simplify right side
    38,481.80x = 703,347,624.78
  5. Step 5: Solve for x
    x = 703,347,624.78/38,481.80
  6. Step 6: Final answer
    x = 18,277.41

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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.