Home / 39,795.40-54,919.11-21,891.78

Finding the Fourth Proportional to 39,795.40, 54,919.11 and 21,891.78

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Solution

The fourth proportional to 39,795.40, 54,919.11 and 21,891.78 is: 30,211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,795.40 : 54,919.11 = 21,891.78 : x
  2. Step 2: Convert to fraction form
    39,795.40/54,919.11 = 21,891.78/x
  3. Step 3: Cross multiply
    39,795.40x = 54,919.11 × 21,891.78
  4. Step 4: Simplify right side
    39,795.40x = 1,202,277,073.92
  5. Step 5: Solve for x
    x = 1,202,277,073.92/39,795.40
  6. Step 6: Final answer
    x = 30,211.46

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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.