Home / 20,234.20-30,336.90-9,131.80

Finding the Fourth Proportional to 20,234.20, 30,336.90 and 9,131.80

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Solution

The fourth proportional to 20,234.20, 30,336.90 and 9,131.80 is: 13,691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,234.20 : 30,336.90 = 9,131.80 : x
  2. Step 2: Convert to fraction form
    20,234.20/30,336.90 = 9,131.80/x
  3. Step 3: Cross multiply
    20,234.20x = 30,336.90 × 9,131.80
  4. Step 4: Simplify right side
    20,234.20x = 277,030,503.42
  5. Step 5: Solve for x
    x = 277,030,503.42/20,234.20
  6. Step 6: Final answer
    x = 13,691.20

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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.