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Finding the Third Proportional to 9,135.28 and 18,999.56

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Solution

The third proportional to 9,135.28 and 18,999.56 is: 39,515.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.28 : 18,999.56 = 18,999.56 : x
  2. Step 2: Convert to fraction form
    9,135.28/18,999.56 = 18,999.56/x
  3. Step 3: Cross multiply
    9,135.28x = 18,999.56 × 18,999.56
  4. Step 4: Simplify right side
    9,135.28x = 360,983,375.19
  5. Step 5: Solve for x
    x = 360,983,375.19/9,135.28
  6. Step 6: Final answer
    x = 39,515.30

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.