Home / 3,917.31-5,405.86-2,149.02

Finding the Fourth Proportional to 3,917.31, 5,405.86 and 2,149.02

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Solution

The fourth proportional to 3,917.31, 5,405.86 and 2,149.02 is: 2,965.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.31 : 5,405.86 = 2,149.02 : x
  2. Step 2: Convert to fraction form
    3,917.31/5,405.86 = 2,149.02/x
  3. Step 3: Cross multiply
    3,917.31x = 5,405.86 × 2,149.02
  4. Step 4: Simplify right side
    3,917.31x = 11,617,301.26
  5. Step 5: Solve for x
    x = 11,617,301.26/3,917.31
  6. Step 6: Final answer
    x = 2,965.63

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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.