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Finding the Third Proportional to 8,815.50 and 18,911.63

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Solution

The third proportional to 8,815.50 and 18,911.63 is: 40,570.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.50 : 18,911.63 = 18,911.63 : x
  2. Step 2: Convert to fraction form
    8,815.50/18,911.63 = 18,911.63/x
  3. Step 3: Cross multiply
    8,815.50x = 18,911.63 × 18,911.63
  4. Step 4: Simplify right side
    8,815.50x = 357,649,560.14
  5. Step 5: Solve for x
    x = 357,649,560.14/8,815.50
  6. Step 6: Final answer
    x = 40,570.54

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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.