Home / 3,917.75-5,406.31-2,149.32

Finding the Fourth Proportional to 3,917.75, 5,406.31 and 2,149.32

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Solution

The fourth proportional to 3,917.75, 5,406.31 and 2,149.32 is: 2,965.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.75 : 5,406.31 = 2,149.32 : x
  2. Step 2: Convert to fraction form
    3,917.75/5,406.31 = 2,149.32/x
  3. Step 3: Cross multiply
    3,917.75x = 5,406.31 × 2,149.32
  4. Step 4: Simplify right side
    3,917.75x = 11,619,882.76
  5. Step 5: Solve for x
    x = 11,619,882.76/3,917.75
  6. Step 6: Final answer
    x = 2,965.96

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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.