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Finding the Third Proportional to 8,621,978 and 11,988,171

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Solution

The third proportional to 8,621,978 and 11,988,171 is: 16,668,593.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621,978 : 11,988,171 = 11,988,171 : x
  2. Step 2: Convert to fraction form
    8,621,978/11,988,171 = 11,988,171/x
  3. Step 3: Cross multiply
    8,621,978x = 11,988,171 × 11,988,171
  4. Step 4: Simplify right side
    8,621,978x = 143,716,243,925,241
  5. Step 5: Solve for x
    x = 143,716,243,925,241/8,621,978
  6. Step 6: Final answer
    x = 16,668,593.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.