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Finding the Third Proportional to 21,628 and 38,396

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Solution

The third proportional to 21,628 and 38,396 is: 68,164.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,628 : 38,396 = 38,396 : x
  2. Step 2: Convert to fraction form
    21,628/38,396 = 38,396/x
  3. Step 3: Cross multiply
    21,628x = 38,396 × 38,396
  4. Step 4: Simplify right side
    21,628x = 1,474,252,816
  5. Step 5: Solve for x
    x = 1,474,252,816/21,628
  6. Step 6: Final answer
    x = 68,164.08

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.