Finding the Fourth Proportional to 11.59, 15.99 and 7.70
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Solution
The fourth proportional to 11.59, 15.99 and 7.70 is: 10.63
Step by Step Solution
- Step 1: Write the proportion equation
11.59 : 15.99 = 7.70 : x - Step 2: Convert to fraction form
11.59/15.99 = 7.70/x - Step 3: Cross multiply
11.59x = 15.99 × 7.70 - Step 4: Simplify right side
11.59x = 123.16 - Step 5: Solve for x
x = 123.16/11.59 - Step 6: Final answer
x = 10.63
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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.