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Finding the Third Proportional to 18,960.50 and 40,828

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Solution

The third proportional to 18,960.50 and 40,828 is: 87,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.50 : 40,828 = 40,828 : x
  2. Step 2: Convert to fraction form
    18,960.50/40,828 = 40,828/x
  3. Step 3: Cross multiply
    18,960.50x = 40,828 × 40,828
  4. Step 4: Simplify right side
    18,960.50x = 1,666,925,584
  5. Step 5: Solve for x
    x = 1,666,925,584/18,960.50
  6. Step 6: Final answer
    x = 87,915.70

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.