Home / 3,722.85-5,137.80-2,129.97

Finding the Fourth Proportional to 3,722.85, 5,137.80 and 2,129.97

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Solution

The fourth proportional to 3,722.85, 5,137.80 and 2,129.97 is: 2,939.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,722.85 : 5,137.80 = 2,129.97 : x
  2. Step 2: Convert to fraction form
    3,722.85/5,137.80 = 2,129.97/x
  3. Step 3: Cross multiply
    3,722.85x = 5,137.80 × 2,129.97
  4. Step 4: Simplify right side
    3,722.85x = 10,943,359.87
  5. Step 5: Solve for x
    x = 10,943,359.87/3,722.85
  6. Step 6: Final answer
    x = 2,939.51

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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.