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Finding the Third Proportional to 18,440 and 20,816

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Solution

The third proportional to 18,440 and 20,816 is: 23,498.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,440 : 20,816 = 20,816 : x
  2. Step 2: Convert to fraction form
    18,440/20,816 = 20,816/x
  3. Step 3: Cross multiply
    18,440x = 20,816 × 20,816
  4. Step 4: Simplify right side
    18,440x = 433,305,856
  5. Step 5: Solve for x
    x = 433,305,856/18,440
  6. Step 6: Final answer
    x = 23,498.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.