Home / 20,982.80-31,517.94-12,234.80

Finding the Fourth Proportional to 20,982.80, 31,517.94 and 12,234.80

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Solution

The fourth proportional to 20,982.80, 31,517.94 and 12,234.80 is: 18,377.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.80 : 31,517.94 = 12,234.80 : x
  2. Step 2: Convert to fraction form
    20,982.80/31,517.94 = 12,234.80/x
  3. Step 3: Cross multiply
    20,982.80x = 31,517.94 × 12,234.80
  4. Step 4: Simplify right side
    20,982.80x = 385,615,692.31
  5. Step 5: Solve for x
    x = 385,615,692.31/20,982.80
  6. Step 6: Final answer
    x = 18,377.70

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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.