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Finding the Third Proportional to 18,860.50 and 20,453.50

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Solution

The third proportional to 18,860.50 and 20,453.50 is: 22,181.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.50 : 20,453.50 = 20,453.50 : x
  2. Step 2: Convert to fraction form
    18,860.50/20,453.50 = 20,453.50/x
  3. Step 3: Cross multiply
    18,860.50x = 20,453.50 × 20,453.50
  4. Step 4: Simplify right side
    18,860.50x = 418,345,662.25
  5. Step 5: Solve for x
    x = 418,345,662.25/18,860.50
  6. Step 6: Final answer
    x = 22,181.05

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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.