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Finding the Third Proportional to 6,940 and 9,090

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Solution

The third proportional to 6,940 and 9,090 is: 11,906.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940 : 9,090 = 9,090 : x
  2. Step 2: Convert to fraction form
    6,940/9,090 = 9,090/x
  3. Step 3: Cross multiply
    6,940x = 9,090 × 9,090
  4. Step 4: Simplify right side
    6,940x = 82,628,100
  5. Step 5: Solve for x
    x = 82,628,100/6,940
  6. Step 6: Final answer
    x = 11,906.07

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.