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Finding the Third Proportional to 12,213 and 21,170

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Solution

The third proportional to 12,213 and 21,170 is: 36,696.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213 : 21,170 = 21,170 : x
  2. Step 2: Convert to fraction form
    12,213/21,170 = 21,170/x
  3. Step 3: Cross multiply
    12,213x = 21,170 × 21,170
  4. Step 4: Simplify right side
    12,213x = 448,168,900
  5. Step 5: Solve for x
    x = 448,168,900/12,213
  6. Step 6: Final answer
    x = 36,696.05

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Why These Related Problems?

These problems maintain the same ratio (1.73) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.