Home / 3,821.83-5,274.35-2,143.78

Finding the Fourth Proportional to 3,821.83, 5,274.35 and 2,143.78

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Solution

The fourth proportional to 3,821.83, 5,274.35 and 2,143.78 is: 2,958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.83 : 5,274.35 = 2,143.78 : x
  2. Step 2: Convert to fraction form
    3,821.83/5,274.35 = 2,143.78/x
  3. Step 3: Cross multiply
    3,821.83x = 5,274.35 × 2,143.78
  4. Step 4: Simplify right side
    3,821.83x = 11,307,046.04
  5. Step 5: Solve for x
    x = 11,307,046.04/3,821.83
  6. Step 6: Final answer
    x = 2,958.54

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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.