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Finding the Third Proportional to 19,922 and 27,920

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Solution

The third proportional to 19,922 and 27,920 is: 39,128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,922 : 27,920 = 27,920 : x
  2. Step 2: Convert to fraction form
    19,922/27,920 = 27,920/x
  3. Step 3: Cross multiply
    19,922x = 27,920 × 27,920
  4. Step 4: Simplify right side
    19,922x = 779,526,400
  5. Step 5: Solve for x
    x = 779,526,400/19,922
  6. Step 6: Final answer
    x = 39,128.92

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.