Home / 3,781.72-5,218.86-2,103.24

Finding the Fourth Proportional to 3,781.72, 5,218.86 and 2,103.24

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Solution

The fourth proportional to 3,781.72, 5,218.86 and 2,103.24 is: 2,902.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.72 : 5,218.86 = 2,103.24 : x
  2. Step 2: Convert to fraction form
    3,781.72/5,218.86 = 2,103.24/x
  3. Step 3: Cross multiply
    3,781.72x = 5,218.86 × 2,103.24
  4. Step 4: Simplify right side
    3,781.72x = 10,976,515.11
  5. Step 5: Solve for x
    x = 10,976,515.11/3,781.72
  6. Step 6: Final answer
    x = 2,902.52

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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.