Finding the Fourth Proportional to 12,298,979.20, 18,453,717.60 and 5,905,940.80
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Solution
The fourth proportional to 12,298,979.20, 18,453,717.60 and 5,905,940.80 is: 8,861,431.66
Step by Step Solution
- Step 1: Write the proportion equation
12,298,979.20 : 18,453,717.60 = 5,905,940.80 : x - Step 2: Convert to fraction form
12,298,979.20/18,453,717.60 = 5,905,940.80/x - Step 3: Cross multiply
12,298,979.20x = 18,453,717.60 × 5,905,940.80 - Step 4: Simplify right side
12,298,979.20x = 108,986,563,685,518.08 - Step 5: Solve for x
x = 108,986,563,685,518.08/12,298,979.20 - Step 6: Final answer
x = 8,861,431.66
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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.