Finding the Fourth Proportional to 42.23, 63.34 and 11.79
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Solution
The fourth proportional to 42.23, 63.34 and 11.79 is: 17.69
Step by Step Solution
- Step 1: Write the proportion equation
42.23 : 63.34 = 11.79 : x - Step 2: Convert to fraction form
42.23/63.34 = 11.79/x - Step 3: Cross multiply
42.23x = 63.34 × 11.79 - Step 4: Simplify right side
42.23x = 746.91 - Step 5: Solve for x
x = 746.91/42.23 - Step 6: Final answer
x = 17.69
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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.