Finding the Fourth Proportional to 11.60, 15.99 and 8.99
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Solution
The fourth proportional to 11.60, 15.99 and 8.99 is: 12.39
Step by Step Solution
- Step 1: Write the proportion equation
11.60 : 15.99 = 8.99 : x - Step 2: Convert to fraction form
11.60/15.99 = 8.99/x - Step 3: Cross multiply
11.60x = 15.99 × 8.99 - Step 4: Simplify right side
11.60x = 143.67 - Step 5: Solve for x
x = 143.67/11.60 - Step 6: Final answer
x = 12.39
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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.