Finding the Fourth Proportional to 7,951,620.78, 10,972,991.30 and 4,688,638.65
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Solution
The fourth proportional to 7,951,620.78, 10,972,991.30 and 4,688,638.65 is: 6,470,176.65
Step by Step Solution
- Step 1: Write the proportion equation
7,951,620.78 : 10,972,991.30 = 4,688,638.65 : x - Step 2: Convert to fraction form
7,951,620.78/10,972,991.30 = 4,688,638.65/x - Step 3: Cross multiply
7,951,620.78x = 10,972,991.30 × 4,688,638.65 - Step 4: Simplify right side
7,951,620.78x = 51,448,391,091,850.55 - Step 5: Solve for x
x = 51,448,391,091,850.55/7,951,620.78 - Step 6: Final answer
x = 6,470,176.65
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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.