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Finding the Third Proportional to 2,989.97 and 6,129.28

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Solution

The third proportional to 2,989.97 and 6,129.28 is: 12,564.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.97 : 6,129.28 = 6,129.28 : x
  2. Step 2: Convert to fraction form
    2,989.97/6,129.28 = 6,129.28/x
  3. Step 3: Cross multiply
    2,989.97x = 6,129.28 × 6,129.28
  4. Step 4: Simplify right side
    2,989.97x = 37,568,088.64
  5. Step 5: Solve for x
    x = 37,568,088.64/2,989.97
  6. Step 6: Final answer
    x = 12,564.71

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.