Home / 12,691.35-17,512.56-7,387.11

Finding the Fourth Proportional to 12,691.35, 17,512.56 and 7,387.11

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Solution

The fourth proportional to 12,691.35, 17,512.56 and 7,387.11 is: 10,193.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.35 : 17,512.56 = 7,387.11 : x
  2. Step 2: Convert to fraction form
    12,691.35/17,512.56 = 7,387.11/x
  3. Step 3: Cross multiply
    12,691.35x = 17,512.56 × 7,387.11
  4. Step 4: Simplify right side
    12,691.35x = 129,367,207.10
  5. Step 5: Solve for x
    x = 129,367,207.10/12,691.35
  6. Step 6: Final answer
    x = 10,193.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.