Home / 12,132.20-18,195.24-8,611.88

Finding the Fourth Proportional to 12,132.20, 18,195.24 and 8,611.88

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Solution

The fourth proportional to 12,132.20, 18,195.24 and 8,611.88 is: 12,915.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,132.20 : 18,195.24 = 8,611.88 : x
  2. Step 2: Convert to fraction form
    12,132.20/18,195.24 = 8,611.88/x
  3. Step 3: Cross multiply
    12,132.20x = 18,195.24 × 8,611.88
  4. Step 4: Simplify right side
    12,132.20x = 156,695,223.45
  5. Step 5: Solve for x
    x = 156,695,223.45/12,132.20
  6. Step 6: Final answer
    x = 12,915.65

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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.