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Finding the Fourth Proportional to 38,405.80, 57,651.90 and 29,679.40

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Solution

The fourth proportional to 38,405.80, 57,651.90 and 29,679.40 is: 44,552.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,405.80 : 57,651.90 = 29,679.40 : x
  2. Step 2: Convert to fraction form
    38,405.80/57,651.90 = 29,679.40/x
  3. Step 3: Cross multiply
    38,405.80x = 57,651.90 × 29,679.40
  4. Step 4: Simplify right side
    38,405.80x = 1,711,073,800.86
  5. Step 5: Solve for x
    x = 1,711,073,800.86/38,405.80
  6. Step 6: Final answer
    x = 44,552.48

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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.