Home / 3,131.43-4,321.36-1,805.11

Finding the Fourth Proportional to 3,131.43, 4,321.36 and 1,805.11

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Solution

The fourth proportional to 3,131.43, 4,321.36 and 1,805.11 is: 2,491.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.43 : 4,321.36 = 1,805.11 : x
  2. Step 2: Convert to fraction form
    3,131.43/4,321.36 = 1,805.11/x
  3. Step 3: Cross multiply
    3,131.43x = 4,321.36 × 1,805.11
  4. Step 4: Simplify right side
    3,131.43x = 7,800,530.15
  5. Step 5: Solve for x
    x = 7,800,530.15/3,131.43
  6. Step 6: Final answer
    x = 2,491.04

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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.