Home / 3,825.80-5,279.82-2,147.12

Finding the Fourth Proportional to 3,825.80, 5,279.82 and 2,147.12

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Solution

The fourth proportional to 3,825.80, 5,279.82 and 2,147.12 is: 2,963.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,825.80 : 5,279.82 = 2,147.12 : x
  2. Step 2: Convert to fraction form
    3,825.80/5,279.82 = 2,147.12/x
  3. Step 3: Cross multiply
    3,825.80x = 5,279.82 × 2,147.12
  4. Step 4: Simplify right side
    3,825.80x = 11,336,407.12
  5. Step 5: Solve for x
    x = 11,336,407.12/3,825.80
  6. Step 6: Final answer
    x = 2,963.15

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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.