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Finding the Third Proportional to 18 and 22.50

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Solution

The third proportional to 18 and 22.50 is: 28.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18 : 22.50 = 22.50 : x
  2. Step 2: Convert to fraction form
    18/22.50 = 22.50/x
  3. Step 3: Cross multiply
    18x = 22.50 × 22.50
  4. Step 4: Simplify right side
    18x = 506.25
  5. Step 5: Solve for x
    x = 506.25/18
  6. Step 6: Final answer
    x = 28.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.