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Finding the Fourth Proportional to 18,672.88, 25,768.20 and 10,719.96

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Solution

The fourth proportional to 18,672.88, 25,768.20 and 10,719.96 is: 14,793.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.88 : 25,768.20 = 10,719.96 : x
  2. Step 2: Convert to fraction form
    18,672.88/25,768.20 = 10,719.96/x
  3. Step 3: Cross multiply
    18,672.88x = 25,768.20 × 10,719.96
  4. Step 4: Simplify right side
    18,672.88x = 276,234,073.27
  5. Step 5: Solve for x
    x = 276,234,073.27/18,672.88
  6. Step 6: Final answer
    x = 14,793.33

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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.