Finding the Fourth Proportional to 33.81, 50.78 and 20.99
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Solution
The fourth proportional to 33.81, 50.78 and 20.99 is: 31.53
Step by Step Solution
- Step 1: Write the proportion equation
33.81 : 50.78 = 20.99 : x - Step 2: Convert to fraction form
33.81/50.78 = 20.99/x - Step 3: Cross multiply
33.81x = 50.78 × 20.99 - Step 4: Simplify right side
33.81x = 1,066.05 - Step 5: Solve for x
x = 1,066.05/33.81 - Step 6: Final answer
x = 31.53
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.