Finding the Fourth Proportional to 21,203.10, 29,257.08 and 11,771.70
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Solution
The fourth proportional to 21,203.10, 29,257.08 and 11,771.70 is: 16,243.17
Step by Step Solution
- Step 1: Write the proportion equation
21,203.10 : 29,257.08 = 11,771.70 : x - Step 2: Convert to fraction form
21,203.10/29,257.08 = 11,771.70/x - Step 3: Cross multiply
21,203.10x = 29,257.08 × 11,771.70 - Step 4: Simplify right side
21,203.10x = 344,405,568.64 - Step 5: Solve for x
x = 344,405,568.64/21,203.10 - Step 6: Final answer
x = 16,243.17
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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.