Finding the Fourth Proportional to 15,307,321.98, 21,124,105.49 and 8,431,804.05
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Solution
The fourth proportional to 15,307,321.98, 21,124,105.49 and 8,431,804.05 is: 11,635,890.22
Step by Step Solution
- Step 1: Write the proportion equation
15,307,321.98 : 21,124,105.49 = 8,431,804.05 : x - Step 2: Convert to fraction form
15,307,321.98/21,124,105.49 = 8,431,804.05/x - Step 3: Cross multiply
15,307,321.98x = 21,124,105.49 × 8,431,804.05 - Step 4: Simplify right side
15,307,321.98x = 178,114,318,165,073.34 - Step 5: Solve for x
x = 178,114,318,165,073.34/15,307,321.98 - Step 6: Final answer
x = 11,635,890.22
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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.