Finding the Fourth Proportional to 20,687,316.09, 28,548,495.99 and 11,990,533.20
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Solution
The fourth proportional to 20,687,316.09, 28,548,495.99 and 11,990,533.20 is: 16,546,935.69
Step by Step Solution
- Step 1: Write the proportion equation
20,687,316.09 : 28,548,495.99 = 11,990,533.20 : x - Step 2: Convert to fraction form
20,687,316.09/28,548,495.99 = 11,990,533.20/x - Step 3: Cross multiply
20,687,316.09x = 28,548,495.99 × 11,990,533.20 - Step 4: Simplify right side
20,687,316.09x = 342,311,688,978,161.81 - Step 5: Solve for x
x = 342,311,688,978,161.81/20,687,316.09 - Step 6: Final answer
x = 16,546,935.69
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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.