Finding the Fourth Proportional to 12,121,685.70, 18,183,403.35 and 7,319,033.70
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Solution
The fourth proportional to 12,121,685.70, 18,183,403.35 and 7,319,033.70 is: 10,979,078.75
Step by Step Solution
- Step 1: Write the proportion equation
12,121,685.70 : 18,183,403.35 = 7,319,033.70 : x - Step 2: Convert to fraction form
12,121,685.70/18,183,403.35 = 7,319,033.70/x - Step 3: Cross multiply
12,121,685.70x = 18,183,403.35 × 7,319,033.70 - Step 4: Simplify right side
12,121,685.70x = 133,084,941,899,342.91 - Step 5: Solve for x
x = 133,084,941,899,342.91/12,121,685.70 - Step 6: Final answer
x = 10,979,078.75
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1.5x scale
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.