Home / 12,149.97-18,217.17-5,128.08

Finding the Fourth Proportional to 12,149.97, 18,217.17 and 5,128.08

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Solution

The fourth proportional to 12,149.97, 18,217.17 and 5,128.08 is: 7,688.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,149.97 : 18,217.17 = 5,128.08 : x
  2. Step 2: Convert to fraction form
    12,149.97/18,217.17 = 5,128.08/x
  3. Step 3: Cross multiply
    12,149.97x = 18,217.17 × 5,128.08
  4. Step 4: Simplify right side
    12,149.97x = 93,419,014.05
  5. Step 5: Solve for x
    x = 93,419,014.05/12,149.97
  6. Step 6: Final answer
    x = 7,688.83

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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.