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Finding the Third Proportional to 3,969,905 and 8,611,822

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Solution

The third proportional to 3,969,905 and 8,611,822 is: 18,681,423.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969,905 : 8,611,822 = 8,611,822 : x
  2. Step 2: Convert to fraction form
    3,969,905/8,611,822 = 8,611,822/x
  3. Step 3: Cross multiply
    3,969,905x = 8,611,822 × 8,611,822
  4. Step 4: Simplify right side
    3,969,905x = 74,163,478,159,684
  5. Step 5: Solve for x
    x = 74,163,478,159,684/3,969,905
  6. Step 6: Final answer
    x = 18,681,423.90

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.