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Finding the Third Proportional to 3,991.50 and 8,583.38

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Solution

The third proportional to 3,991.50 and 8,583.38 is: 18,457.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.50 : 8,583.38 = 8,583.38 : x
  2. Step 2: Convert to fraction form
    3,991.50/8,583.38 = 8,583.38/x
  3. Step 3: Cross multiply
    3,991.50x = 8,583.38 × 8,583.38
  4. Step 4: Simplify right side
    3,991.50x = 73,674,326.39
  5. Step 5: Solve for x
    x = 73,674,326.39/3,991.50
  6. Step 6: Final answer
    x = 18,457.80

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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.