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Finding the Third Proportional to 11,811,816 and 18,221,420

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Solution

The third proportional to 11,811,816 and 18,221,420 is: 28,109,153.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811,816 : 18,221,420 = 18,221,420 : x
  2. Step 2: Convert to fraction form
    11,811,816/18,221,420 = 18,221,420/x
  3. Step 3: Cross multiply
    11,811,816x = 18,221,420 × 18,221,420
  4. Step 4: Simplify right side
    11,811,816x = 332,020,146,816,400
  5. Step 5: Solve for x
    x = 332,020,146,816,400/11,811,816
  6. Step 6: Final answer
    x = 28,109,153.31

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.