Home / 3,981.28-5,491.90-2,487.37

Finding the Fourth Proportional to 3,981.28, 5,491.90 and 2,487.37

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Solution

The fourth proportional to 3,981.28, 5,491.90 and 2,487.37 is: 3,431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.28 : 5,491.90 = 2,487.37 : x
  2. Step 2: Convert to fraction form
    3,981.28/5,491.90 = 2,487.37/x
  3. Step 3: Cross multiply
    3,981.28x = 5,491.90 × 2,487.37
  4. Step 4: Simplify right side
    3,981.28x = 13,660,387.30
  5. Step 5: Solve for x
    x = 13,660,387.30/3,981.28
  6. Step 6: Final answer
    x = 3,431.15

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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.