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Finding the Third Proportional to 18,145.27 and 20,656.90

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Solution

The third proportional to 18,145.27 and 20,656.90 is: 23,516.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145.27 : 20,656.90 = 20,656.90 : x
  2. Step 2: Convert to fraction form
    18,145.27/20,656.90 = 20,656.90/x
  3. Step 3: Cross multiply
    18,145.27x = 20,656.90 × 20,656.90
  4. Step 4: Simplify right side
    18,145.27x = 426,707,453.06
  5. Step 5: Solve for x
    x = 426,707,453.06/18,145.27
  6. Step 6: Final answer
    x = 23,516.19

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.