Finding the Third Proportional to 16.21 and 18.31
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Solution
The third proportional to 16.21 and 18.31 is: 20.69
Step by Step Solution
- Step 1: Write the proportion equation
16.21 : 18.31 = 18.31 : x - Step 2: Convert to fraction form
16.21/18.31 = 18.31/x - Step 3: Cross multiply
16.21x = 18.31 × 18.31 - Step 4: Simplify right side
16.21x = 335.25 - Step 5: Solve for x
x = 335.25/16.21 - Step 6: Final answer
x = 20.69
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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.