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Finding the Fourth Proportional to 38,488.80, 57,734.80 and 12,192.96

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Solution

The fourth proportional to 38,488.80, 57,734.80 and 12,192.96 is: 18,289.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,488.80 : 57,734.80 = 12,192.96 : x
  2. Step 2: Convert to fraction form
    38,488.80/57,734.80 = 12,192.96/x
  3. Step 3: Cross multiply
    38,488.80x = 57,734.80 × 12,192.96
  4. Step 4: Simplify right side
    38,488.80x = 703,958,107.01
  5. Step 5: Solve for x
    x = 703,958,107.01/38,488.80
  6. Step 6: Final answer
    x = 18,289.95

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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.