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Finding the Third Proportional to 6,420 and 13,659

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Solution

The third proportional to 6,420 and 13,659 is: 29,060.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420 : 13,659 = 13,659 : x
  2. Step 2: Convert to fraction form
    6,420/13,659 = 13,659/x
  3. Step 3: Cross multiply
    6,420x = 13,659 × 13,659
  4. Step 4: Simplify right side
    6,420x = 186,568,281
  5. Step 5: Solve for x
    x = 186,568,281/6,420
  6. Step 6: Final answer
    x = 29,060.48

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.