Home / 3,712.76-5,121.87-2,139.94

Finding the Fourth Proportional to 3,712.76, 5,121.87 and 2,139.94

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Solution

The fourth proportional to 3,712.76, 5,121.87 and 2,139.94 is: 2,952.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.76 : 5,121.87 = 2,139.94 : x
  2. Step 2: Convert to fraction form
    3,712.76/5,121.87 = 2,139.94/x
  3. Step 3: Cross multiply
    3,712.76x = 5,121.87 × 2,139.94
  4. Step 4: Simplify right side
    3,712.76x = 10,960,494.49
  5. Step 5: Solve for x
    x = 10,960,494.49/3,712.76
  6. Step 6: Final answer
    x = 2,952.12

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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.