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Finding the Fourth Proportional to 39,912.80, 55,083.35 and 22,919.27

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Solution

The fourth proportional to 39,912.80, 55,083.35 and 22,919.27 is: 31,630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,912.80 : 55,083.35 = 22,919.27 : x
  2. Step 2: Convert to fraction form
    39,912.80/55,083.35 = 22,919.27/x
  3. Step 3: Cross multiply
    39,912.80x = 55,083.35 × 22,919.27
  4. Step 4: Simplify right side
    39,912.80x = 1,262,469,953.04
  5. Step 5: Solve for x
    x = 1,262,469,953.04/39,912.80
  6. Step 6: Final answer
    x = 31,630.71

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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.