Home / 3,871.92-5,343.18-2,103.51

Finding the Fourth Proportional to 3,871.92, 5,343.18 and 2,103.51

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Solution

The fourth proportional to 3,871.92, 5,343.18 and 2,103.51 is: 2,902.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.92 : 5,343.18 = 2,103.51 : x
  2. Step 2: Convert to fraction form
    3,871.92/5,343.18 = 2,103.51/x
  3. Step 3: Cross multiply
    3,871.92x = 5,343.18 × 2,103.51
  4. Step 4: Simplify right side
    3,871.92x = 11,239,432.56
  5. Step 5: Solve for x
    x = 11,239,432.56/3,871.92
  6. Step 6: Final answer
    x = 2,902.81

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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.