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Finding the Third Proportional to 3,540 and 8,355

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Solution

The third proportional to 3,540 and 8,355 is: 19,719.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540 : 8,355 = 8,355 : x
  2. Step 2: Convert to fraction form
    3,540/8,355 = 8,355/x
  3. Step 3: Cross multiply
    3,540x = 8,355 × 8,355
  4. Step 4: Simplify right side
    3,540x = 69,806,025
  5. Step 5: Solve for x
    x = 69,806,025/3,540
  6. Step 6: Final answer
    x = 19,719.22

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.