Home / 3,142.13-4,339.67-2,721.78

Finding the Fourth Proportional to 3,142.13, 4,339.67 and 2,721.78

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Solution

The fourth proportional to 3,142.13, 4,339.67 and 2,721.78 is: 3,759.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,142.13 : 4,339.67 = 2,721.78 : x
  2. Step 2: Convert to fraction form
    3,142.13/4,339.67 = 2,721.78/x
  3. Step 3: Cross multiply
    3,142.13x = 4,339.67 × 2,721.78
  4. Step 4: Simplify right side
    3,142.13x = 11,811,613.40
  5. Step 5: Solve for x
    x = 11,811,613.40/3,142.13
  6. Step 6: Final answer
    x = 3,759.12

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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.