Home / 3,821.28-5,272.92-2,142.60

Finding the Fourth Proportional to 3,821.28, 5,272.92 and 2,142.60

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Solution

The fourth proportional to 3,821.28, 5,272.92 and 2,142.60 is: 2,956.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.28 : 5,272.92 = 2,142.60 : x
  2. Step 2: Convert to fraction form
    3,821.28/5,272.92 = 2,142.60/x
  3. Step 3: Cross multiply
    3,821.28x = 5,272.92 × 2,142.60
  4. Step 4: Simplify right side
    3,821.28x = 11,297,758.39
  5. Step 5: Solve for x
    x = 11,297,758.39/3,821.28
  6. Step 6: Final answer
    x = 2,956.54

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1.5x scale

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.