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Finding the Third Proportional to 20.80 and 32.38

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Solution

The third proportional to 20.80 and 32.38 is: 50.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.80 : 32.38 = 32.38 : x
  2. Step 2: Convert to fraction form
    20.80/32.38 = 32.38/x
  3. Step 3: Cross multiply
    20.80x = 32.38 × 32.38
  4. Step 4: Simplify right side
    20.80x = 1,048.14
  5. Step 5: Solve for x
    x = 1,048.14/20.80
  6. Step 6: Final answer
    x = 50.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.