Home / 3,906.25-5,390.75-2,137.85

Finding the Fourth Proportional to 3,906.25, 5,390.75 and 2,137.85

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Solution

The fourth proportional to 3,906.25, 5,390.75 and 2,137.85 is: 2,950.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.25 : 5,390.75 = 2,137.85 : x
  2. Step 2: Convert to fraction form
    3,906.25/5,390.75 = 2,137.85/x
  3. Step 3: Cross multiply
    3,906.25x = 5,390.75 × 2,137.85
  4. Step 4: Simplify right side
    3,906.25x = 11,524,614.89
  5. Step 5: Solve for x
    x = 11,524,614.89/3,906.25
  6. Step 6: Final answer
    x = 2,950.30

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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.