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Finding the Fourth Proportional to 20,245.78, 30,373.50 and 6,394.78

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Solution

The fourth proportional to 20,245.78, 30,373.50 and 6,394.78 is: 9,593.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.78 : 30,373.50 = 6,394.78 : x
  2. Step 2: Convert to fraction form
    20,245.78/30,373.50 = 6,394.78/x
  3. Step 3: Cross multiply
    20,245.78x = 30,373.50 × 6,394.78
  4. Step 4: Simplify right side
    20,245.78x = 194,231,850.33
  5. Step 5: Solve for x
    x = 194,231,850.33/20,245.78
  6. Step 6: Final answer
    x = 9,593.70

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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.