Finding the Fourth Proportional to 13.19, 19.74 and 9.79
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Solution
The fourth proportional to 13.19, 19.74 and 9.79 is: 14.66
Step by Step Solution
- Step 1: Write the proportion equation
13.19 : 19.74 = 9.79 : x - Step 2: Convert to fraction form
13.19/19.74 = 9.79/x - Step 3: Cross multiply
13.19x = 19.74 × 9.79 - Step 4: Simplify right side
13.19x = 193.24 - Step 5: Solve for x
x = 193.24/13.19 - Step 6: Final answer
x = 14.66
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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.