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Finding the Third Proportional to 8,821.22 and 18,921.56

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Solution

The third proportional to 8,821.22 and 18,921.56 is: 40,586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.22 : 18,921.56 = 18,921.56 : x
  2. Step 2: Convert to fraction form
    8,821.22/18,921.56 = 18,921.56/x
  3. Step 3: Cross multiply
    8,821.22x = 18,921.56 × 18,921.56
  4. Step 4: Simplify right side
    8,821.22x = 358,025,527.44
  5. Step 5: Solve for x
    x = 358,025,527.44/8,821.22
  6. Step 6: Final answer
    x = 40,586.86

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.