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Finding the Fourth Proportional to 20,475.73, 30,691.05 and 7,993.45

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Solution

The fourth proportional to 20,475.73, 30,691.05 and 7,993.45 is: 11,981.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.73 : 30,691.05 = 7,993.45 : x
  2. Step 2: Convert to fraction form
    20,475.73/30,691.05 = 7,993.45/x
  3. Step 3: Cross multiply
    20,475.73x = 30,691.05 × 7,993.45
  4. Step 4: Simplify right side
    20,475.73x = 245,327,373.62
  5. Step 5: Solve for x
    x = 245,327,373.62/20,475.73
  6. Step 6: Final answer
    x = 11,981.37

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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.