Finding the Fourth Proportional to 7,881,722.20, 11,822,583.30 and 5,189,087.80
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Solution
The fourth proportional to 7,881,722.20, 11,822,583.30 and 5,189,087.80 is: 7,783,631.70
Step by Step Solution
- Step 1: Write the proportion equation
7,881,722.20 : 11,822,583.30 = 5,189,087.80 : x - Step 2: Convert to fraction form
7,881,722.20/11,822,583.30 = 5,189,087.80/x - Step 3: Cross multiply
7,881,722.20x = 11,822,583.30 × 5,189,087.80 - Step 4: Simplify right side
7,881,722.20x = 61,348,422,766,513.74 - Step 5: Solve for x
x = 61,348,422,766,513.74/7,881,722.20 - Step 6: Final answer
x = 7,783,631.70
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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.