Finding the Fourth Proportional to 12,257,432.20, 18,358,154.70 and 7,218,584.20
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Solution
The fourth proportional to 12,257,432.20, 18,358,154.70 and 7,218,584.20 is: 10,811,390.45
Step by Step Solution
- Step 1: Write the proportion equation
12,257,432.20 : 18,358,154.70 = 7,218,584.20 : x - Step 2: Convert to fraction form
12,257,432.20/18,358,154.70 = 7,218,584.20/x - Step 3: Cross multiply
12,257,432.20x = 18,358,154.70 × 7,218,584.20 - Step 4: Simplify right side
12,257,432.20x = 132,519,885,458,575.73 - Step 5: Solve for x
x = 132,519,885,458,575.73/12,257,432.20 - Step 6: Final answer
x = 10,811,390.45
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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.