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Finding the Third Proportional to 18,558 and 20,506.50

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Solution

The third proportional to 18,558 and 20,506.50 is: 22,659.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,558 : 20,506.50 = 20,506.50 : x
  2. Step 2: Convert to fraction form
    18,558/20,506.50 = 20,506.50/x
  3. Step 3: Cross multiply
    18,558x = 20,506.50 × 20,506.50
  4. Step 4: Simplify right side
    18,558x = 420,516,542.25
  5. Step 5: Solve for x
    x = 420,516,542.25/18,558
  6. Step 6: Final answer
    x = 22,659.58

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.