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Finding the Third Proportional to 18,885.66 and 20,422.13

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Solution

The third proportional to 18,885.66 and 20,422.13 is: 22,083.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.66 : 20,422.13 = 20,422.13 : x
  2. Step 2: Convert to fraction form
    18,885.66/20,422.13 = 20,422.13/x
  3. Step 3: Cross multiply
    18,885.66x = 20,422.13 × 20,422.13
  4. Step 4: Simplify right side
    18,885.66x = 417,063,189.52
  5. Step 5: Solve for x
    x = 417,063,189.52/18,885.66
  6. Step 6: Final answer
    x = 22,083.60

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.