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Finding the Third Proportional to 12,979,720 and 20,177,556

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Solution

The third proportional to 12,979,720 and 20,177,556 is: 31,366,914.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979,720 : 20,177,556 = 20,177,556 : x
  2. Step 2: Convert to fraction form
    12,979,720/20,177,556 = 20,177,556/x
  3. Step 3: Cross multiply
    12,979,720x = 20,177,556 × 20,177,556
  4. Step 4: Simplify right side
    12,979,720x = 407,133,766,133,136
  5. Step 5: Solve for x
    x = 407,133,766,133,136/12,979,720
  6. Step 6: Final answer
    x = 31,366,914.40

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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.