Home / 3,843.78-5,301.45-2,781.72

Finding the Fourth Proportional to 3,843.78, 5,301.45 and 2,781.72

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Solution

The fourth proportional to 3,843.78, 5,301.45 and 2,781.72 is: 3,836.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,843.78 : 5,301.45 = 2,781.72 : x
  2. Step 2: Convert to fraction form
    3,843.78/5,301.45 = 2,781.72/x
  3. Step 3: Cross multiply
    3,843.78x = 5,301.45 × 2,781.72
  4. Step 4: Simplify right side
    3,843.78x = 14,747,149.49
  5. Step 5: Solve for x
    x = 14,747,149.49/3,843.78
  6. Step 6: Final answer
    x = 3,836.63

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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.