Home / 3,899.73-5,381.36-2,131.31

Finding the Fourth Proportional to 3,899.73, 5,381.36 and 2,131.31

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Solution

The fourth proportional to 3,899.73, 5,381.36 and 2,131.31 is: 2,941.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.73 : 5,381.36 = 2,131.31 : x
  2. Step 2: Convert to fraction form
    3,899.73/5,381.36 = 2,131.31/x
  3. Step 3: Cross multiply
    3,899.73x = 5,381.36 × 2,131.31
  4. Step 4: Simplify right side
    3,899.73x = 11,469,308.82
  5. Step 5: Solve for x
    x = 11,469,308.82/3,899.73
  6. Step 6: Final answer
    x = 2,941.05

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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.