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Finding the Fourth Proportional to 38,687.88, 57,954.06 and 20,181

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Solution

The fourth proportional to 38,687.88, 57,954.06 and 20,181 is: 30,230.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,687.88 : 57,954.06 = 20,181 : x
  2. Step 2: Convert to fraction form
    38,687.88/57,954.06 = 20,181/x
  3. Step 3: Cross multiply
    38,687.88x = 57,954.06 × 20,181
  4. Step 4: Simplify right side
    38,687.88x = 1,169,570,884.86
  5. Step 5: Solve for x
    x = 1,169,570,884.86/38,687.88
  6. Step 6: Final answer
    x = 30,230.94

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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.