Finding the Fourth Proportional to 8.55, 12.80 and 6
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Solution
The fourth proportional to 8.55, 12.80 and 6 is: 8.98
Step by Step Solution
- Step 1: Write the proportion equation
8.55 : 12.80 = 6 : x - Step 2: Convert to fraction form
8.55/12.80 = 6/x - Step 3: Cross multiply
8.55x = 12.80 × 6 - Step 4: Simplify right side
8.55x = 76.80 - Step 5: Solve for x
x = 76.80/8.55 - Step 6: Final answer
x = 8.98
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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.