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Finding the Third Proportional to 6,220 and 10,690

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Solution

The third proportional to 6,220 and 10,690 is: 18,372.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,220 : 10,690 = 10,690 : x
  2. Step 2: Convert to fraction form
    6,220/10,690 = 10,690/x
  3. Step 3: Cross multiply
    6,220x = 10,690 × 10,690
  4. Step 4: Simplify right side
    6,220x = 114,276,100
  5. Step 5: Solve for x
    x = 114,276,100/6,220
  6. Step 6: Final answer
    x = 18,372.36

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.