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Finding the Third Proportional to 10,640 and 21,712

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Solution

The third proportional to 10,640 and 21,712 is: 44,305.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640 : 21,712 = 21,712 : x
  2. Step 2: Convert to fraction form
    10,640/21,712 = 21,712/x
  3. Step 3: Cross multiply
    10,640x = 21,712 × 21,712
  4. Step 4: Simplify right side
    10,640x = 471,410,944
  5. Step 5: Solve for x
    x = 471,410,944/10,640
  6. Step 6: Final answer
    x = 44,305.54

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.