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Finding the Third Proportional to 8,705.25 and 18,639.75

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Solution

The third proportional to 8,705.25 and 18,639.75 is: 39,911.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.25 : 18,639.75 = 18,639.75 : x
  2. Step 2: Convert to fraction form
    8,705.25/18,639.75 = 18,639.75/x
  3. Step 3: Cross multiply
    8,705.25x = 18,639.75 × 18,639.75
  4. Step 4: Simplify right side
    8,705.25x = 347,440,280.06
  5. Step 5: Solve for x
    x = 347,440,280.06/8,705.25
  6. Step 6: Final answer
    x = 39,911.58

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.