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Finding the Third Proportional to 18,712.69 and 25,639.03

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Solution

The third proportional to 18,712.69 and 25,639.03 is: 35,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.69 : 25,639.03 = 25,639.03 : x
  2. Step 2: Convert to fraction form
    18,712.69/25,639.03 = 25,639.03/x
  3. Step 3: Cross multiply
    18,712.69x = 25,639.03 × 25,639.03
  4. Step 4: Simplify right side
    18,712.69x = 657,359,923.44
  5. Step 5: Solve for x
    x = 657,359,923.44/18,712.69
  6. Step 6: Final answer
    x = 35,129.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.