Home / 3,906.28-5,390.61-2,137.86

Finding the Fourth Proportional to 3,906.28, 5,390.61 and 2,137.86

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Solution

The fourth proportional to 3,906.28, 5,390.61 and 2,137.86 is: 2,950.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.28 : 5,390.61 = 2,137.86 : x
  2. Step 2: Convert to fraction form
    3,906.28/5,390.61 = 2,137.86/x
  3. Step 3: Cross multiply
    3,906.28x = 5,390.61 × 2,137.86
  4. Step 4: Simplify right side
    3,906.28x = 11,524,369.49
  5. Step 5: Solve for x
    x = 11,524,369.49/3,906.28
  6. Step 6: Final answer
    x = 2,950.22

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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.