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Finding the Third Proportional to 18,121.50 and 25,519.50

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Solution

The third proportional to 18,121.50 and 25,519.50 is: 35,937.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.50 : 25,519.50 = 25,519.50 : x
  2. Step 2: Convert to fraction form
    18,121.50/25,519.50 = 25,519.50/x
  3. Step 3: Cross multiply
    18,121.50x = 25,519.50 × 25,519.50
  4. Step 4: Simplify right side
    18,121.50x = 651,244,880.25
  5. Step 5: Solve for x
    x = 651,244,880.25/18,121.50
  6. Step 6: Final answer
    x = 35,937.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.