Finding the Fourth Proportional to 7,728.21, 11,576.93 and 5,759.91
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Solution
The fourth proportional to 7,728.21, 11,576.93 and 5,759.91 is: 8,628.39
Step by Step Solution
- Step 1: Write the proportion equation
7,728.21 : 11,576.93 = 5,759.91 : x - Step 2: Convert to fraction form
7,728.21/11,576.93 = 5,759.91/x - Step 3: Cross multiply
7,728.21x = 11,576.93 × 5,759.91 - Step 4: Simplify right side
7,728.21x = 66,682,046.08 - Step 5: Solve for x
x = 66,682,046.08/7,728.21 - Step 6: Final answer
x = 8,628.39
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1.5x scale
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.