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Finding the Third Proportional to 3,940.69 and 8,649.19

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Solution

The third proportional to 3,940.69 and 8,649.19 is: 18,983.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.69 : 8,649.19 = 8,649.19 : x
  2. Step 2: Convert to fraction form
    3,940.69/8,649.19 = 8,649.19/x
  3. Step 3: Cross multiply
    3,940.69x = 8,649.19 × 8,649.19
  4. Step 4: Simplify right side
    3,940.69x = 74,808,444.41
  5. Step 5: Solve for x
    x = 74,808,444.41/3,940.69
  6. Step 6: Final answer
    x = 18,983.60

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.