Finding the Fourth Proportional to 25.18, 34.65 and 20.99
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Solution
The fourth proportional to 25.18, 34.65 and 20.99 is: 28.88
Step by Step Solution
- Step 1: Write the proportion equation
25.18 : 34.65 = 20.99 : x - Step 2: Convert to fraction form
25.18/34.65 = 20.99/x - Step 3: Cross multiply
25.18x = 34.65 × 20.99 - Step 4: Simplify right side
25.18x = 727.30 - Step 5: Solve for x
x = 727.30/25.18 - Step 6: Final answer
x = 28.88
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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.