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Finding the Third Proportional to 12,979,886 and 20,177,794

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Solution

The third proportional to 12,979,886 and 20,177,794 is: 31,367,253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979,886 : 20,177,794 = 20,177,794 : x
  2. Step 2: Convert to fraction form
    12,979,886/20,177,794 = 20,177,794/x
  3. Step 3: Cross multiply
    12,979,886x = 20,177,794 × 20,177,794
  4. Step 4: Simplify right side
    12,979,886x = 407,143,370,706,436
  5. Step 5: Solve for x
    x = 407,143,370,706,436/12,979,886
  6. Step 6: Final answer
    x = 31,367,253.20

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.