Finding the Fourth Proportional to 11.00, 16.47 and 7.79
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Solution
The fourth proportional to 11.00, 16.47 and 7.79 is: 11.66
Step by Step Solution
- Step 1: Write the proportion equation
11.00 : 16.47 = 7.79 : x - Step 2: Convert to fraction form
11.00/16.47 = 7.79/x - Step 3: Cross multiply
11.00x = 16.47 × 7.79 - Step 4: Simplify right side
11.00x = 128.22 - Step 5: Solve for x
x = 128.22/11.00 - Step 6: Final answer
x = 11.66
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.