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Finding the Fourth Proportional to 38,785.80, 58,105.80 and 20,001.90

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Solution

The fourth proportional to 38,785.80, 58,105.80 and 20,001.90 is: 29,965.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,785.80 : 58,105.80 = 20,001.90 : x
  2. Step 2: Convert to fraction form
    38,785.80/58,105.80 = 20,001.90/x
  3. Step 3: Cross multiply
    38,785.80x = 58,105.80 × 20,001.90
  4. Step 4: Simplify right side
    38,785.80x = 1,162,226,401.02
  5. Step 5: Solve for x
    x = 1,162,226,401.02/38,785.80
  6. Step 6: Final answer
    x = 29,965.26

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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.