Home / 3,809.79-5,257.78-2,131.36

Finding the Fourth Proportional to 3,809.79, 5,257.78 and 2,131.36

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Solution

The fourth proportional to 3,809.79, 5,257.78 and 2,131.36 is: 2,941.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.79 : 5,257.78 = 2,131.36 : x
  2. Step 2: Convert to fraction form
    3,809.79/5,257.78 = 2,131.36/x
  3. Step 3: Cross multiply
    3,809.79x = 5,257.78 × 2,131.36
  4. Step 4: Simplify right side
    3,809.79x = 11,206,195.69
  5. Step 5: Solve for x
    x = 11,206,195.69/3,809.79
  6. Step 6: Final answer
    x = 2,941.42

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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.