Finding the Fourth Proportional to 18,717.44, 28,076.09 and 7,621.65
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Solution
The fourth proportional to 18,717.44, 28,076.09 and 7,621.65 is: 11,432.45
Step by Step Solution
- Step 1: Write the proportion equation
18,717.44 : 28,076.09 = 7,621.65 : x - Step 2: Convert to fraction form
18,717.44/28,076.09 = 7,621.65/x - Step 3: Cross multiply
18,717.44x = 28,076.09 × 7,621.65 - Step 4: Simplify right side
18,717.44x = 213,986,093.24 - Step 5: Solve for x
x = 213,986,093.24/18,717.44 - Step 6: Final answer
x = 11,432.45
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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.