Home / 20,000.44-30,010.82-12,121.78

Finding the Fourth Proportional to 20,000.44, 30,010.82 and 12,121.78

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Solution

The fourth proportional to 20,000.44, 30,010.82 and 12,121.78 is: 18,188.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,000.44 : 30,010.82 = 12,121.78 : x
  2. Step 2: Convert to fraction form
    20,000.44/30,010.82 = 12,121.78/x
  3. Step 3: Cross multiply
    20,000.44x = 30,010.82 × 12,121.78
  4. Step 4: Simplify right side
    20,000.44x = 363,784,557.66
  5. Step 5: Solve for x
    x = 363,784,557.66/20,000.44
  6. Step 6: Final answer
    x = 18,188.83

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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.