Home / 3,871.85-5,343.09-2,103.49

Finding the Fourth Proportional to 3,871.85, 5,343.09 and 2,103.49

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Solution

The fourth proportional to 3,871.85, 5,343.09 and 2,103.49 is: 2,902.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.85 : 5,343.09 = 2,103.49 : x
  2. Step 2: Convert to fraction form
    3,871.85/5,343.09 = 2,103.49/x
  3. Step 3: Cross multiply
    3,871.85x = 5,343.09 × 2,103.49
  4. Step 4: Simplify right side
    3,871.85x = 11,239,109.67
  5. Step 5: Solve for x
    x = 11,239,109.67/3,871.85
  6. Step 6: Final answer
    x = 2,902.78

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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.