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Finding the Third Proportional to 3,638.81 and 6,418.69

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Solution

The third proportional to 3,638.81 and 6,418.69 is: 11,322.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.81 : 6,418.69 = 6,418.69 : x
  2. Step 2: Convert to fraction form
    3,638.81/6,418.69 = 6,418.69/x
  3. Step 3: Cross multiply
    3,638.81x = 6,418.69 × 6,418.69
  4. Step 4: Simplify right side
    3,638.81x = 41,199,549.22
  5. Step 5: Solve for x
    x = 41,199,549.22/3,638.81
  6. Step 6: Final answer
    x = 11,322.25

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.