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Finding the Third Proportional to 9,015 and 19,690.50

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Solution

The third proportional to 9,015 and 19,690.50 is: 43,007.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,015 : 19,690.50 = 19,690.50 : x
  2. Step 2: Convert to fraction form
    9,015/19,690.50 = 19,690.50/x
  3. Step 3: Cross multiply
    9,015x = 19,690.50 × 19,690.50
  4. Step 4: Simplify right side
    9,015x = 387,715,790.25
  5. Step 5: Solve for x
    x = 387,715,790.25/9,015
  6. Step 6: Final answer
    x = 43,007.85

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.