Finding the Fourth Proportional to 7,019,688.88, 9,687,234.78 and 4,119,128.09
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Solution
The fourth proportional to 7,019,688.88, 9,687,234.78 and 4,119,128.09 is: 5,684,434.39
Step by Step Solution
- Step 1: Write the proportion equation
7,019,688.88 : 9,687,234.78 = 4,119,128.09 : x - Step 2: Convert to fraction form
7,019,688.88/9,687,234.78 = 4,119,128.09/x - Step 3: Cross multiply
7,019,688.88x = 9,687,234.78 × 4,119,128.09 - Step 4: Simplify right side
7,019,688.88x = 39,902,960,848,286.80 - Step 5: Solve for x
x = 39,902,960,848,286.80/7,019,688.88 - Step 6: Final answer
x = 5,684,434.39
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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.