Home / 12,220.92-18,321.12-8,512.20

Finding the Fourth Proportional to 12,220.92, 18,321.12 and 8,512.20

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Solution

The fourth proportional to 12,220.92, 18,321.12 and 8,512.20 is: 12,761.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.92 : 18,321.12 = 8,512.20 : x
  2. Step 2: Convert to fraction form
    12,220.92/18,321.12 = 8,512.20/x
  3. Step 3: Cross multiply
    12,220.92x = 18,321.12 × 8,512.20
  4. Step 4: Simplify right side
    12,220.92x = 155,953,037.66
  5. Step 5: Solve for x
    x = 155,953,037.66/12,220.92
  6. Step 6: Final answer
    x = 12,761.15

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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.