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Finding the Fourth Proportional to 39,794.96, 54,917.18 and 21,891.11

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Solution

The fourth proportional to 39,794.96, 54,917.18 and 21,891.11 is: 30,209.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,794.96 : 54,917.18 = 21,891.11 : x
  2. Step 2: Convert to fraction form
    39,794.96/54,917.18 = 21,891.11/x
  3. Step 3: Cross multiply
    39,794.96x = 54,917.18 × 21,891.11
  4. Step 4: Simplify right side
    39,794.96x = 1,202,197,644.23
  5. Step 5: Solve for x
    x = 1,202,197,644.23/39,794.96
  6. Step 6: Final answer
    x = 30,209.79

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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.