Home / 8,127.14-12,189.49-3,128.22

Finding the Fourth Proportional to 8,127.14, 12,189.49 and 3,128.22

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Solution

The fourth proportional to 8,127.14, 12,189.49 and 3,128.22 is: 4,691.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,127.14 : 12,189.49 = 3,128.22 : x
  2. Step 2: Convert to fraction form
    8,127.14/12,189.49 = 3,128.22/x
  3. Step 3: Cross multiply
    8,127.14x = 12,189.49 × 3,128.22
  4. Step 4: Simplify right side
    8,127.14x = 38,131,398.59
  5. Step 5: Solve for x
    x = 38,131,398.59/8,127.14
  6. Step 6: Final answer
    x = 4,691.86

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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.