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Finding the Fourth Proportional to 39,796.53, 54,918.04 and 21,891.52

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Solution

The fourth proportional to 39,796.53, 54,918.04 and 21,891.52 is: 30,209.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,796.53 : 54,918.04 = 21,891.52 : x
  2. Step 2: Convert to fraction form
    39,796.53/54,918.04 = 21,891.52/x
  3. Step 3: Cross multiply
    39,796.53x = 54,918.04 × 21,891.52
  4. Step 4: Simplify right side
    39,796.53x = 1,202,239,261.56
  5. Step 5: Solve for x
    x = 1,202,239,261.56/39,796.53
  6. Step 6: Final answer
    x = 30,209.65

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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.