Finding the Fourth Proportional to 18.44, 25.42 and 12.99
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Solution
The fourth proportional to 18.44, 25.42 and 12.99 is: 17.91
Step by Step Solution
- Step 1: Write the proportion equation
18.44 : 25.42 = 12.99 : x - Step 2: Convert to fraction form
18.44/25.42 = 12.99/x - Step 3: Cross multiply
18.44x = 25.42 × 12.99 - Step 4: Simplify right side
18.44x = 330.21 - Step 5: Solve for x
x = 330.21/18.44 - Step 6: Final answer
x = 17.91
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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.