Finding the Fourth Proportional to 21.99, 30.08 and 21.68
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Solution
The fourth proportional to 21.99, 30.08 and 21.68 is: 29.66
Step by Step Solution
- Step 1: Write the proportion equation
21.99 : 30.08 = 21.68 : x - Step 2: Convert to fraction form
21.99/30.08 = 21.68/x - Step 3: Cross multiply
21.99x = 30.08 × 21.68 - Step 4: Simplify right side
21.99x = 652.13 - Step 5: Solve for x
x = 652.13/21.99 - Step 6: Final answer
x = 29.66
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.