Home / 3,991.34-5,502.38-2,871.92

Finding the Fourth Proportional to 3,991.34, 5,502.38 and 2,871.92

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Solution

The fourth proportional to 3,991.34, 5,502.38 and 2,871.92 is: 3,959.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.34 : 5,502.38 = 2,871.92 : x
  2. Step 2: Convert to fraction form
    3,991.34/5,502.38 = 2,871.92/x
  3. Step 3: Cross multiply
    3,991.34x = 5,502.38 × 2,871.92
  4. Step 4: Simplify right side
    3,991.34x = 15,802,353.30
  5. Step 5: Solve for x
    x = 15,802,353.30/3,991.34
  6. Step 6: Final answer
    x = 3,959.16

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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.