Home / 20,125.20-30,192.60-8,431.92

Finding the Fourth Proportional to 20,125.20, 30,192.60 and 8,431.92

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Solution

The fourth proportional to 20,125.20, 30,192.60 and 8,431.92 is: 12,649.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.20 : 30,192.60 = 8,431.92 : x
  2. Step 2: Convert to fraction form
    20,125.20/30,192.60 = 8,431.92/x
  3. Step 3: Cross multiply
    20,125.20x = 30,192.60 × 8,431.92
  4. Step 4: Simplify right side
    20,125.20x = 254,581,587.79
  5. Step 5: Solve for x
    x = 254,581,587.79/20,125.20
  6. Step 6: Final answer
    x = 12,649.89

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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.