Finding the Fourth Proportional to 20,318,197.76, 28,047,858.56 and 12,478,979.84
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Solution
The fourth proportional to 20,318,197.76, 28,047,858.56 and 12,478,979.84 is: 17,226,363.56
Step by Step Solution
- Step 1: Write the proportion equation
20,318,197.76 : 28,047,858.56 = 12,478,979.84 : x - Step 2: Convert to fraction form
20,318,197.76/28,047,858.56 = 12,478,979.84/x - Step 3: Cross multiply
20,318,197.76x = 28,047,858.56 × 12,478,979.84 - Step 4: Simplify right side
20,318,197.76x = 350,008,661,525,411.44 - Step 5: Solve for x
x = 350,008,661,525,411.44/20,318,197.76 - Step 6: Final answer
x = 17,226,363.56
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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.