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Finding the Third Proportional to 12,165.19 and 20,221.21

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Solution

The third proportional to 12,165.19 and 20,221.21 is: 33,612.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.19 : 20,221.21 = 20,221.21 : x
  2. Step 2: Convert to fraction form
    12,165.19/20,221.21 = 20,221.21/x
  3. Step 3: Cross multiply
    12,165.19x = 20,221.21 × 20,221.21
  4. Step 4: Simplify right side
    12,165.19x = 408,897,213.80
  5. Step 5: Solve for x
    x = 408,897,213.80/12,165.19
  6. Step 6: Final answer
    x = 33,612.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.