Home / 3,712.68-5,121.30-2,139.66

Finding the Fourth Proportional to 3,712.68, 5,121.30 and 2,139.66

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Solution

The fourth proportional to 3,712.68, 5,121.30 and 2,139.66 is: 2,951.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.68 : 5,121.30 = 2,139.66 : x
  2. Step 2: Convert to fraction form
    3,712.68/5,121.30 = 2,139.66/x
  3. Step 3: Cross multiply
    3,712.68x = 5,121.30 × 2,139.66
  4. Step 4: Simplify right side
    3,712.68x = 10,957,840.76
  5. Step 5: Solve for x
    x = 10,957,840.76/3,712.68
  6. Step 6: Final answer
    x = 2,951.46

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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.