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Finding the Third Proportional to 4,190 and 9,109

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Solution

The third proportional to 4,190 and 9,109 is: 19,802.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,190 : 9,109 = 9,109 : x
  2. Step 2: Convert to fraction form
    4,190/9,109 = 9,109/x
  3. Step 3: Cross multiply
    4,190x = 9,109 × 9,109
  4. Step 4: Simplify right side
    4,190x = 82,973,881
  5. Step 5: Solve for x
    x = 82,973,881/4,190
  6. Step 6: Final answer
    x = 19,802.84

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.