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Finding the Third Proportional to 8,489,821.78 and 13,239,186.75

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Solution

The third proportional to 8,489,821.78 and 13,239,186.75 is: 20,645,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489,821.78 : 13,239,186.75 = 13,239,186.75 : x
  2. Step 2: Convert to fraction form
    8,489,821.78/13,239,186.75 = 13,239,186.75/x
  3. Step 3: Cross multiply
    8,489,821.78x = 13,239,186.75 × 13,239,186.75
  4. Step 4: Simplify right side
    8,489,821.78x = 175,276,065,801,375.56
  5. Step 5: Solve for x
    x = 175,276,065,801,375.56/8,489,821.78
  6. Step 6: Final answer
    x = 20,645,435.24

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.