Home / 7,218.20-9,961.13-3,906.20

Finding the Fourth Proportional to 7,218.20, 9,961.13 and 3,906.20

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Solution

The fourth proportional to 7,218.20, 9,961.13 and 3,906.20 is: 5,390.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.20 : 9,961.13 = 3,906.20 : x
  2. Step 2: Convert to fraction form
    7,218.20/9,961.13 = 3,906.20/x
  3. Step 3: Cross multiply
    7,218.20x = 9,961.13 × 3,906.20
  4. Step 4: Simplify right side
    7,218.20x = 38,910,096.67
  5. Step 5: Solve for x
    x = 38,910,096.67/7,218.20
  6. Step 6: Final answer
    x = 5,390.56

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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.