Home / 20,195.80-30,282.10-8,517.20

Finding the Fourth Proportional to 20,195.80, 30,282.10 and 8,517.20

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Solution

The fourth proportional to 20,195.80, 30,282.10 and 8,517.20 is: 12,770.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,195.80 : 30,282.10 = 8,517.20 : x
  2. Step 2: Convert to fraction form
    20,195.80/30,282.10 = 8,517.20/x
  3. Step 3: Cross multiply
    20,195.80x = 30,282.10 × 8,517.20
  4. Step 4: Simplify right side
    20,195.80x = 257,918,702.12
  5. Step 5: Solve for x
    x = 257,918,702.12/20,195.80
  6. Step 6: Final answer
    x = 12,770.91

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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.