Home / 3,809.80-5,257.26-2,131.16

Finding the Fourth Proportional to 3,809.80, 5,257.26 and 2,131.16

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Solution

The fourth proportional to 3,809.80, 5,257.26 and 2,131.16 is: 2,940.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.80 : 5,257.26 = 2,131.16 : x
  2. Step 2: Convert to fraction form
    3,809.80/5,257.26 = 2,131.16/x
  3. Step 3: Cross multiply
    3,809.80x = 5,257.26 × 2,131.16
  4. Step 4: Simplify right side
    3,809.80x = 11,204,062.22
  5. Step 5: Solve for x
    x = 11,204,062.22/3,809.80
  6. Step 6: Final answer
    x = 2,940.85

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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.