Finding the Fourth Proportional to 8,187.24, 12,285.18 and 6,421.44
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Solution
The fourth proportional to 8,187.24, 12,285.18 and 6,421.44 is: 9,635.55
Step by Step Solution
- Step 1: Write the proportion equation
8,187.24 : 12,285.18 = 6,421.44 : x - Step 2: Convert to fraction form
8,187.24/12,285.18 = 6,421.44/x - Step 3: Cross multiply
8,187.24x = 12,285.18 × 6,421.44 - Step 4: Simplify right side
8,187.24x = 78,888,546.26 - Step 5: Solve for x
x = 78,888,546.26/8,187.24 - Step 6: Final answer
x = 9,635.55
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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.