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Finding the Fourth Proportional to 20,273.52, 27,945.71 and 18,644.21

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Solution

The fourth proportional to 20,273.52, 27,945.71 and 18,644.21 is: 25,699.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,273.52 : 27,945.71 = 18,644.21 : x
  2. Step 2: Convert to fraction form
    20,273.52/27,945.71 = 18,644.21/x
  3. Step 3: Cross multiply
    20,273.52x = 27,945.71 × 18,644.21
  4. Step 4: Simplify right side
    20,273.52x = 521,025,627.60
  5. Step 5: Solve for x
    x = 521,025,627.60/20,273.52
  6. Step 6: Final answer
    x = 25,699.81

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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.