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Finding the Fourth Proportional to 57,329.80, 86,009.55 and 21,791.72

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Solution

The fourth proportional to 57,329.80, 86,009.55 and 21,791.72 is: 32,693.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,329.80 : 86,009.55 = 21,791.72 : x
  2. Step 2: Convert to fraction form
    57,329.80/86,009.55 = 21,791.72/x
  3. Step 3: Cross multiply
    57,329.80x = 86,009.55 × 21,791.72
  4. Step 4: Simplify right side
    57,329.80x = 1,874,296,164.23
  5. Step 5: Solve for x
    x = 1,874,296,164.23/57,329.80
  6. Step 6: Final answer
    x = 32,693.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.