Finding the Fourth Proportional to 12,438.22, 17,163.75 and 7,134.70
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Solution
The fourth proportional to 12,438.22, 17,163.75 and 7,134.70 is: 9,845.32
Step by Step Solution
- Step 1: Write the proportion equation
12,438.22 : 17,163.75 = 7,134.70 : x - Step 2: Convert to fraction form
12,438.22/17,163.75 = 7,134.70/x - Step 3: Cross multiply
12,438.22x = 17,163.75 × 7,134.70 - Step 4: Simplify right side
12,438.22x = 122,458,207.13 - Step 5: Solve for x
x = 122,458,207.13/12,438.22 - Step 6: Final answer
x = 9,845.32
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1.5x scale
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.