Home / 3,906.50-5,390.97-2,138.11

Finding the Fourth Proportional to 3,906.50, 5,390.97 and 2,138.11

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Solution

The fourth proportional to 3,906.50, 5,390.97 and 2,138.11 is: 2,950.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.50 : 5,390.97 = 2,138.11 : x
  2. Step 2: Convert to fraction form
    3,906.50/5,390.97 = 2,138.11/x
  3. Step 3: Cross multiply
    3,906.50x = 5,390.97 × 2,138.11
  4. Step 4: Simplify right side
    3,906.50x = 11,526,486.87
  5. Step 5: Solve for x
    x = 11,526,486.87/3,906.50
  6. Step 6: Final answer
    x = 2,950.59

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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.