Home / 3,882.21-5,357.31-2,113.78

Finding the Fourth Proportional to 3,882.21, 5,357.31 and 2,113.78

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Solution

The fourth proportional to 3,882.21, 5,357.31 and 2,113.78 is: 2,916.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,882.21 : 5,357.31 = 2,113.78 : x
  2. Step 2: Convert to fraction form
    3,882.21/5,357.31 = 2,113.78/x
  3. Step 3: Cross multiply
    3,882.21x = 5,357.31 × 2,113.78
  4. Step 4: Simplify right side
    3,882.21x = 11,324,174.73
  5. Step 5: Solve for x
    x = 11,324,174.73/3,882.21
  6. Step 6: Final answer
    x = 2,916.94

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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.