Finding the Fourth Proportional to 20,912,669.91, 28,860,134.10 and 11,493,289.99
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Solution
The fourth proportional to 20,912,669.91, 28,860,134.10 and 11,493,289.99 is: 15,861,097.21
Step by Step Solution
- Step 1: Write the proportion equation
20,912,669.91 : 28,860,134.10 = 11,493,289.99 : x - Step 2: Convert to fraction form
20,912,669.91/28,860,134.10 = 11,493,289.99/x - Step 3: Cross multiply
20,912,669.91x = 28,860,134.10 × 11,493,289.99 - Step 4: Simplify right side
20,912,669.91x = 331,697,890,397,662.88 - Step 5: Solve for x
x = 331,697,890,397,662.88/20,912,669.91 - Step 6: Final answer
x = 15,861,097.21
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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.