Home / 3,871.13-5,342.21-2,102.72

Finding the Fourth Proportional to 3,871.13, 5,342.21 and 2,102.72

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Solution

The fourth proportional to 3,871.13, 5,342.21 and 2,102.72 is: 2,901.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.13 : 5,342.21 = 2,102.72 : x
  2. Step 2: Convert to fraction form
    3,871.13/5,342.21 = 2,102.72/x
  3. Step 3: Cross multiply
    3,871.13x = 5,342.21 × 2,102.72
  4. Step 4: Simplify right side
    3,871.13x = 11,233,134.59
  5. Step 5: Solve for x
    x = 11,233,134.59/3,871.13
  6. Step 6: Final answer
    x = 2,901.78

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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.