Finding the Fourth Proportional to 12.45, 17.18 and 6.99
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Solution
The fourth proportional to 12.45, 17.18 and 6.99 is: 9.65
Step by Step Solution
- Step 1: Write the proportion equation
12.45 : 17.18 = 6.99 : x - Step 2: Convert to fraction form
12.45/17.18 = 6.99/x - Step 3: Cross multiply
12.45x = 17.18 × 6.99 - Step 4: Simplify right side
12.45x = 120.08 - Step 5: Solve for x
x = 120.08/12.45 - Step 6: Final answer
x = 9.65
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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.