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Finding the Third Proportional to 18,979,420 and 39,304,664

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Solution

The third proportional to 18,979,420 and 39,304,664 is: 81,396,407.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979,420 : 39,304,664 = 39,304,664 : x
  2. Step 2: Convert to fraction form
    18,979,420/39,304,664 = 39,304,664/x
  3. Step 3: Cross multiply
    18,979,420x = 39,304,664 × 39,304,664
  4. Step 4: Simplify right side
    18,979,420x = 1,544,856,612,152,896
  5. Step 5: Solve for x
    x = 1,544,856,612,152,896/18,979,420
  6. Step 6: Final answer
    x = 81,396,407.91

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.