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Finding the Third Proportional to 12,165.19 and 18,820.16

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Solution

The third proportional to 12,165.19 and 18,820.16 is: 29,115.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.19 : 18,820.16 = 18,820.16 : x
  2. Step 2: Convert to fraction form
    12,165.19/18,820.16 = 18,820.16/x
  3. Step 3: Cross multiply
    12,165.19x = 18,820.16 × 18,820.16
  4. Step 4: Simplify right side
    12,165.19x = 354,198,428.31
  5. Step 5: Solve for x
    x = 354,198,428.31/12,165.19
  6. Step 6: Final answer
    x = 29,115.74

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.