Finding the Fourth Proportional to 11.86, 17.70 and 11.09
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Solution
The fourth proportional to 11.86, 17.70 and 11.09 is: 16.55
Step by Step Solution
- Step 1: Write the proportion equation
11.86 : 17.70 = 11.09 : x - Step 2: Convert to fraction form
11.86/17.70 = 11.09/x - Step 3: Cross multiply
11.86x = 17.70 × 11.09 - Step 4: Simplify right side
11.86x = 196.29 - Step 5: Solve for x
x = 196.29/11.86 - Step 6: Final answer
x = 16.55
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.