Finding the Fourth Proportional to 20,431,402.88, 28,194,486.24 and 11,138,771.84
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Solution
The fourth proportional to 20,431,402.88, 28,194,486.24 and 11,138,771.84 is: 15,371,041.88
Step by Step Solution
- Step 1: Write the proportion equation
20,431,402.88 : 28,194,486.24 = 11,138,771.84 : x - Step 2: Convert to fraction form
20,431,402.88/28,194,486.24 = 11,138,771.84/x - Step 3: Cross multiply
20,431,402.88x = 28,194,486.24 × 11,138,771.84 - Step 4: Simplify right side
20,431,402.88x = 314,051,949,373,379.44 - Step 5: Solve for x
x = 314,051,949,373,379.44/20,431,402.88 - Step 6: Final answer
x = 15,371,041.88
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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.