Home / 3,940.25-5,909.56-1,938.13

Finding the Fourth Proportional to 3,940.25, 5,909.56 and 1,938.13

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Solution

The fourth proportional to 3,940.25, 5,909.56 and 1,938.13 is: 2,906.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.25 : 5,909.56 = 1,938.13 : x
  2. Step 2: Convert to fraction form
    3,940.25/5,909.56 = 1,938.13/x
  3. Step 3: Cross multiply
    3,940.25x = 5,909.56 × 1,938.13
  4. Step 4: Simplify right side
    3,940.25x = 11,453,475.90
  5. Step 5: Solve for x
    x = 11,453,475.90/3,940.25
  6. Step 6: Final answer
    x = 2,906.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.