Home / 20,084.20-30,131.10-8,390.92

Finding the Fourth Proportional to 20,084.20, 30,131.10 and 8,390.92

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Solution

The fourth proportional to 20,084.20, 30,131.10 and 8,390.92 is: 12,588.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,084.20 : 30,131.10 = 8,390.92 : x
  2. Step 2: Convert to fraction form
    20,084.20/30,131.10 = 8,390.92/x
  3. Step 3: Cross multiply
    20,084.20x = 30,131.10 × 8,390.92
  4. Step 4: Simplify right side
    20,084.20x = 252,827,649.61
  5. Step 5: Solve for x
    x = 252,827,649.61/20,084.20
  6. Step 6: Final answer
    x = 12,588.39

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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.