Finding the Fourth Proportional to 21,628,865.60, 29,847,843.86 and 11,839,365.62
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Solution
The fourth proportional to 21,628,865.60, 29,847,843.86 and 11,839,365.62 is: 16,338,329.66
Step by Step Solution
- Step 1: Write the proportion equation
21,628,865.60 : 29,847,843.86 = 11,839,365.62 : x - Step 2: Convert to fraction form
21,628,865.60/29,847,843.86 = 11,839,365.62/x - Step 3: Cross multiply
21,628,865.60x = 29,847,843.86 × 11,839,365.62 - Step 4: Simplify right side
21,628,865.60x = 353,379,536,218,776.06 - Step 5: Solve for x
x = 353,379,536,218,776.06/21,628,865.60 - Step 6: Final answer
x = 16,338,329.66
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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.