Home / 12,882.20-17,778.92-7,218.48

Finding the Fourth Proportional to 12,882.20, 17,778.92 and 7,218.48

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Solution

The fourth proportional to 12,882.20, 17,778.92 and 7,218.48 is: 9,962.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,882.20 : 17,778.92 = 7,218.48 : x
  2. Step 2: Convert to fraction form
    12,882.20/17,778.92 = 7,218.48/x
  3. Step 3: Cross multiply
    12,882.20x = 17,778.92 × 7,218.48
  4. Step 4: Simplify right side
    12,882.20x = 128,336,742.35
  5. Step 5: Solve for x
    x = 128,336,742.35/12,882.20
  6. Step 6: Final answer
    x = 9,962.33

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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.