Home / 3,821.80-5,274-2,143.30

Finding the Fourth Proportional to 3,821.80, 5,274 and 2,143.30

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Solution

The fourth proportional to 3,821.80, 5,274 and 2,143.30 is: 2,957.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.80 : 5,274 = 2,143.30 : x
  2. Step 2: Convert to fraction form
    3,821.80/5,274 = 2,143.30/x
  3. Step 3: Cross multiply
    3,821.80x = 5,274 × 2,143.30
  4. Step 4: Simplify right side
    3,821.80x = 11,303,764.20
  5. Step 5: Solve for x
    x = 11,303,764.20/3,821.80
  6. Step 6: Final answer
    x = 2,957.71

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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.