Home / 7,218.75-9,961.91-3,906.75

Finding the Fourth Proportional to 7,218.75, 9,961.91 and 3,906.75

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Solution

The fourth proportional to 7,218.75, 9,961.91 and 3,906.75 is: 5,391.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.75 : 9,961.91 = 3,906.75 : x
  2. Step 2: Convert to fraction form
    7,218.75/9,961.91 = 3,906.75/x
  3. Step 3: Cross multiply
    7,218.75x = 9,961.91 × 3,906.75
  4. Step 4: Simplify right side
    7,218.75x = 38,918,691.89
  5. Step 5: Solve for x
    x = 38,918,691.89/7,218.75
  6. Step 6: Final answer
    x = 5,391.33

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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.