Finding the Fourth Proportional to 13,431,777,891.30, 20,147,666,836.95 and 6,440,990,400.90
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Solution
The fourth proportional to 13,431,777,891.30, 20,147,666,836.95 and 6,440,990,400.90 is: 9,661,485,601.35
Step by Step Solution
- Step 1: Write the proportion equation
13,431,777,891.30 : 20,147,666,836.95 = 6,440,990,400.90 : x - Step 2: Convert to fraction form
13,431,777,891.30/20,147,666,836.95 = 6,440,990,400.90/x - Step 3: Cross multiply
13,431,777,891.30x = 20,147,666,836.95 × 6,440,990,400.90 - Step 4: Simplify right side
13,431,777,891.30x = 129,770,928,697,326,206,976 - Step 5: Solve for x
x = 129,770,928,697,326,206,976/13,431,777,891.30 - Step 6: Final answer
x = 9,661,485,601.35
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.