Finding the Fourth Proportional to 20,915,847.98, 28,864,571.10 and 11,623,809.62
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Solution
The fourth proportional to 20,915,847.98, 28,864,571.10 and 11,623,809.62 is: 16,041,246.79
Step by Step Solution
- Step 1: Write the proportion equation
20,915,847.98 : 28,864,571.10 = 11,623,809.62 : x - Step 2: Convert to fraction form
20,915,847.98/28,864,571.10 = 11,623,809.62/x - Step 3: Cross multiply
20,915,847.98x = 28,864,571.10 × 11,623,809.62 - Step 4: Simplify right side
20,915,847.98x = 335,516,279,229,354 - Step 5: Solve for x
x = 335,516,279,229,354/20,915,847.98 - Step 6: Final answer
x = 16,041,246.79
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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.