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Finding the Fourth Proportional to 39,791.68, 54,912.24 and 21,886.24

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Solution

The fourth proportional to 39,791.68, 54,912.24 and 21,886.24 is: 30,202.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,791.68 : 54,912.24 = 21,886.24 : x
  2. Step 2: Convert to fraction form
    39,791.68/54,912.24 = 21,886.24/x
  3. Step 3: Cross multiply
    39,791.68x = 54,912.24 × 21,886.24
  4. Step 4: Simplify right side
    39,791.68x = 1,201,822,463.58
  5. Step 5: Solve for x
    x = 1,201,822,463.58/39,791.68
  6. Step 6: Final answer
    x = 30,202.86

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1.5x scale

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.