Home / 3,871.30-5,342.40-2,102.88

Finding the Fourth Proportional to 3,871.30, 5,342.40 and 2,102.88

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Solution

The fourth proportional to 3,871.30, 5,342.40 and 2,102.88 is: 2,901.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.30 : 5,342.40 = 2,102.88 : x
  2. Step 2: Convert to fraction form
    3,871.30/5,342.40 = 2,102.88/x
  3. Step 3: Cross multiply
    3,871.30x = 5,342.40 × 2,102.88
  4. Step 4: Simplify right side
    3,871.30x = 11,234,426.11
  5. Step 5: Solve for x
    x = 11,234,426.11/3,871.30
  6. Step 6: Final answer
    x = 2,901.98

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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.