Finding the Fourth Proportional to 11.91, 16.44 and 7.31
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Solution
The fourth proportional to 11.91, 16.44 and 7.31 is: 10.09
Step by Step Solution
- Step 1: Write the proportion equation
11.91 : 16.44 = 7.31 : x - Step 2: Convert to fraction form
11.91/16.44 = 7.31/x - Step 3: Cross multiply
11.91x = 16.44 × 7.31 - Step 4: Simplify right side
11.91x = 120.22 - Step 5: Solve for x
x = 120.22/11.91 - Step 6: Final answer
x = 10.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.