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Finding the Third Proportional to 21,628 and 27,636

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Solution

The third proportional to 21,628 and 27,636 is: 35,312.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,628 : 27,636 = 27,636 : x
  2. Step 2: Convert to fraction form
    21,628/27,636 = 27,636/x
  3. Step 3: Cross multiply
    21,628x = 27,636 × 27,636
  4. Step 4: Simplify right side
    21,628x = 763,748,496
  5. Step 5: Solve for x
    x = 763,748,496/21,628
  6. Step 6: Final answer
    x = 35,312.95

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.