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Finding the Third Proportional to 15.66 and 33.64

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Solution

The third proportional to 15.66 and 33.64 is: 72.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.66 : 33.64 = 33.64 : x
  2. Step 2: Convert to fraction form
    15.66/33.64 = 33.64/x
  3. Step 3: Cross multiply
    15.66x = 33.64 × 33.64
  4. Step 4: Simplify right side
    15.66x = 1,131.51
  5. Step 5: Solve for x
    x = 1,131.51/15.66
  6. Step 6: Final answer
    x = 72.25

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.