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Finding the Third Proportional to 18,703.50 and 39,999.75

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Solution

The third proportional to 18,703.50 and 39,999.75 is: 85,544.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.50 : 39,999.75 = 39,999.75 : x
  2. Step 2: Convert to fraction form
    18,703.50/39,999.75 = 39,999.75/x
  3. Step 3: Cross multiply
    18,703.50x = 39,999.75 × 39,999.75
  4. Step 4: Simplify right side
    18,703.50x = 1,599,980,000.06
  5. Step 5: Solve for x
    x = 1,599,980,000.06/18,703.50
  6. Step 6: Final answer
    x = 85,544.42

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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.