Finding the Fourth Proportional to 20,628,301.44, 28,455,201.95 and 12,879,891.66
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Solution
The fourth proportional to 20,628,301.44, 28,455,201.95 and 12,879,891.66 is: 17,766,849.07
Step by Step Solution
- Step 1: Write the proportion equation
20,628,301.44 : 28,455,201.95 = 12,879,891.66 : x - Step 2: Convert to fraction form
20,628,301.44/28,455,201.95 = 12,879,891.66/x - Step 3: Cross multiply
20,628,301.44x = 28,455,201.95 × 12,879,891.66 - Step 4: Simplify right side
20,628,301.44x = 366,499,918,321,728.31 - Step 5: Solve for x
x = 366,499,918,321,728.31/20,628,301.44 - Step 6: Final answer
x = 17,766,849.07
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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.