Finding the Fourth Proportional to 20.07, 27.72 and 18.09
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Solution
The fourth proportional to 20.07, 27.72 and 18.09 is: 24.99
Step by Step Solution
- Step 1: Write the proportion equation
20.07 : 27.72 = 18.09 : x - Step 2: Convert to fraction form
20.07/27.72 = 18.09/x - Step 3: Cross multiply
20.07x = 27.72 × 18.09 - Step 4: Simplify right side
20.07x = 501.45 - Step 5: Solve for x
x = 501.45/20.07 - Step 6: Final answer
x = 24.99
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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.