Home / 3,871.81-5,343.12-2,103.43

Finding the Fourth Proportional to 3,871.81, 5,343.12 and 2,103.43

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Solution

The fourth proportional to 3,871.81, 5,343.12 and 2,103.43 is: 2,902.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.81 : 5,343.12 = 2,103.43 : x
  2. Step 2: Convert to fraction form
    3,871.81/5,343.12 = 2,103.43/x
  3. Step 3: Cross multiply
    3,871.81x = 5,343.12 × 2,103.43
  4. Step 4: Simplify right side
    3,871.81x = 11,238,878.90
  5. Step 5: Solve for x
    x = 11,238,878.90/3,871.81
  6. Step 6: Final answer
    x = 2,902.75

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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.