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Finding the Third Proportional to 4,212 and 9,144

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Solution

The third proportional to 4,212 and 9,144 is: 19,851.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,212 : 9,144 = 9,144 : x
  2. Step 2: Convert to fraction form
    4,212/9,144 = 9,144/x
  3. Step 3: Cross multiply
    4,212x = 9,144 × 9,144
  4. Step 4: Simplify right side
    4,212x = 83,612,736
  5. Step 5: Solve for x
    x = 83,612,736/4,212
  6. Step 6: Final answer
    x = 19,851.08

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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.