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Finding the Third Proportional to 6,518 and 13,690

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Solution

The third proportional to 6,518 and 13,690 is: 28,753.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,518 : 13,690 = 13,690 : x
  2. Step 2: Convert to fraction form
    6,518/13,690 = 13,690/x
  3. Step 3: Cross multiply
    6,518x = 13,690 × 13,690
  4. Step 4: Simplify right side
    6,518x = 187,416,100
  5. Step 5: Solve for x
    x = 187,416,100/6,518
  6. Step 6: Final answer
    x = 28,753.62

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.