Finding the Fourth Proportional to 10.64, 15.98 and 7.98
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Solution
The fourth proportional to 10.64, 15.98 and 7.98 is: 11.99
Step by Step Solution
- Step 1: Write the proportion equation
10.64 : 15.98 = 7.98 : x - Step 2: Convert to fraction form
10.64/15.98 = 7.98/x - Step 3: Cross multiply
10.64x = 15.98 × 7.98 - Step 4: Simplify right side
10.64x = 127.48 - Step 5: Solve for x
x = 127.48/10.64 - Step 6: Final answer
x = 11.99
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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.