Home / 8,128.20-12,191.58-3,966.60

Finding the Fourth Proportional to 8,128.20, 12,191.58 and 3,966.60

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Solution

The fourth proportional to 8,128.20, 12,191.58 and 3,966.60 is: 5,949.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.20 : 12,191.58 = 3,966.60 : x
  2. Step 2: Convert to fraction form
    8,128.20/12,191.58 = 3,966.60/x
  3. Step 3: Cross multiply
    8,128.20x = 12,191.58 × 3,966.60
  4. Step 4: Simplify right side
    8,128.20x = 48,359,121.23
  5. Step 5: Solve for x
    x = 48,359,121.23/8,128.20
  6. Step 6: Final answer
    x = 5,949.55

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Similar ratio
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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.