Home / 3,809.70-5,257.62-2,131.31

Finding the Fourth Proportional to 3,809.70, 5,257.62 and 2,131.31

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Solution

The fourth proportional to 3,809.70, 5,257.62 and 2,131.31 is: 2,941.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.70 : 5,257.62 = 2,131.31 : x
  2. Step 2: Convert to fraction form
    3,809.70/5,257.62 = 2,131.31/x
  3. Step 3: Cross multiply
    3,809.70x = 5,257.62 × 2,131.31
  4. Step 4: Simplify right side
    3,809.70x = 11,205,591.79
  5. Step 5: Solve for x
    x = 11,205,591.79/3,809.70
  6. Step 6: Final answer
    x = 2,941.33

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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.