Finding the Fourth Proportional to 18,591,780.62, 25,659,699.93 and 15,489,384.44
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Solution
The fourth proportional to 18,591,780.62, 25,659,699.93 and 15,489,384.44 is: 21,377,885.47
Step by Step Solution
- Step 1: Write the proportion equation
18,591,780.62 : 25,659,699.93 = 15,489,384.44 : x - Step 2: Convert to fraction form
18,591,780.62/25,659,699.93 = 15,489,384.44/x - Step 3: Cross multiply
18,591,780.62x = 25,659,699.93 × 15,489,384.44 - Step 4: Simplify right side
18,591,780.62x = 397,452,956,830,811.06 - Step 5: Solve for x
x = 397,452,956,830,811.06/18,591,780.62 - Step 6: Final answer
x = 21,377,885.47
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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.