Finding the Fourth Proportional to 7,926,416.80, 11,889,625.20 and 5,186,543.20
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Solution
The fourth proportional to 7,926,416.80, 11,889,625.20 and 5,186,543.20 is: 7,779,814.80
Step by Step Solution
- Step 1: Write the proportion equation
7,926,416.80 : 11,889,625.20 = 5,186,543.20 : x - Step 2: Convert to fraction form
7,926,416.80/11,889,625.20 = 5,186,543.20/x - Step 3: Cross multiply
7,926,416.80x = 11,889,625.20 × 5,186,543.20 - Step 4: Simplify right side
7,926,416.80x = 61,666,054,731,608.64 - Step 5: Solve for x
x = 61,666,054,731,608.64/7,926,416.80 - Step 6: Final answer
x = 7,779,814.80
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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.