Finding the Fourth Proportional to 28,571.29, 42,863.78 and 11,922.09
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Solution
The fourth proportional to 28,571.29, 42,863.78 and 11,922.09 is: 17,885.99
Step by Step Solution
- Step 1: Write the proportion equation
28,571.29 : 42,863.78 = 11,922.09 : x - Step 2: Convert to fraction form
28,571.29/42,863.78 = 11,922.09/x - Step 3: Cross multiply
28,571.29x = 42,863.78 × 11,922.09 - Step 4: Simplify right side
28,571.29x = 511,025,842.90 - Step 5: Solve for x
x = 511,025,842.90/28,571.29 - Step 6: Final answer
x = 17,885.99
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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.