Home / 3,906.44-5,390.87-2,138.04

Finding the Fourth Proportional to 3,906.44, 5,390.87 and 2,138.04

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Solution

The fourth proportional to 3,906.44, 5,390.87 and 2,138.04 is: 2,950.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.44 : 5,390.87 = 2,138.04 : x
  2. Step 2: Convert to fraction form
    3,906.44/5,390.87 = 2,138.04/x
  3. Step 3: Cross multiply
    3,906.44x = 5,390.87 × 2,138.04
  4. Step 4: Simplify right side
    3,906.44x = 11,525,895.69
  5. Step 5: Solve for x
    x = 11,525,895.69/3,906.44
  6. Step 6: Final answer
    x = 2,950.49

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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.