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Finding the Fourth Proportional to 38,665.80, 57,998.70 and 20,195.40

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Solution

The fourth proportional to 38,665.80, 57,998.70 and 20,195.40 is: 30,293.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,665.80 : 57,998.70 = 20,195.40 : x
  2. Step 2: Convert to fraction form
    38,665.80/57,998.70 = 20,195.40/x
  3. Step 3: Cross multiply
    38,665.80x = 57,998.70 × 20,195.40
  4. Step 4: Simplify right side
    38,665.80x = 1,171,306,945.98
  5. Step 5: Solve for x
    x = 1,171,306,945.98/38,665.80
  6. Step 6: Final answer
    x = 30,293.10

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Similar ratio
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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.