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Finding the Third Proportional to 7,110 and 8,690

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Solution

The third proportional to 7,110 and 8,690 is: 10,621.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,110 : 8,690 = 8,690 : x
  2. Step 2: Convert to fraction form
    7,110/8,690 = 8,690/x
  3. Step 3: Cross multiply
    7,110x = 8,690 × 8,690
  4. Step 4: Simplify right side
    7,110x = 75,516,100
  5. Step 5: Solve for x
    x = 75,516,100/7,110
  6. Step 6: Final answer
    x = 10,621.11

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.