Finding the Fourth Proportional to 15,578,923.49, 21,497,788.09 and 8,609,517.64
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Solution
The fourth proportional to 15,578,923.49, 21,497,788.09 and 8,609,517.64 is: 11,880,511.90
Step by Step Solution
- Step 1: Write the proportion equation
15,578,923.49 : 21,497,788.09 = 8,609,517.64 : x - Step 2: Convert to fraction form
15,578,923.49/21,497,788.09 = 8,609,517.64/x - Step 3: Cross multiply
15,578,923.49x = 21,497,788.09 × 8,609,517.64 - Step 4: Simplify right side
15,578,923.49x = 185,085,585,819,471 - Step 5: Solve for x
x = 185,085,585,819,471/15,578,923.49 - Step 6: Final answer
x = 11,880,511.90
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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.