Finding the Fourth Proportional to 21.01, 29.01 and 13.75
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Solution
The fourth proportional to 21.01, 29.01 and 13.75 is: 18.99
Step by Step Solution
- Step 1: Write the proportion equation
21.01 : 29.01 = 13.75 : x - Step 2: Convert to fraction form
21.01/29.01 = 13.75/x - Step 3: Cross multiply
21.01x = 29.01 × 13.75 - Step 4: Simplify right side
21.01x = 398.89 - Step 5: Solve for x
x = 398.89/21.01 - Step 6: Final answer
x = 18.99
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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.