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Finding the Third Proportional to 5,240 and 10,660

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Solution

The third proportional to 5,240 and 10,660 is: 21,686.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,240 : 10,660 = 10,660 : x
  2. Step 2: Convert to fraction form
    5,240/10,660 = 10,660/x
  3. Step 3: Cross multiply
    5,240x = 10,660 × 10,660
  4. Step 4: Simplify right side
    5,240x = 113,635,600
  5. Step 5: Solve for x
    x = 113,635,600/5,240
  6. Step 6: Final answer
    x = 21,686.18

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.