Finding the Fourth Proportional to 21,581,486.70, 32,372,230.05 and 18,810,120.30
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Solution
The fourth proportional to 21,581,486.70, 32,372,230.05 and 18,810,120.30 is: 28,215,180.45
Step by Step Solution
- Step 1: Write the proportion equation
21,581,486.70 : 32,372,230.05 = 18,810,120.30 : x - Step 2: Convert to fraction form
21,581,486.70/32,372,230.05 = 18,810,120.30/x - Step 3: Cross multiply
21,581,486.70x = 32,372,230.05 × 18,810,120.30 - Step 4: Simplify right side
21,581,486.70x = 608,925,541,619,775 - Step 5: Solve for x
x = 608,925,541,619,775/21,581,486.70 - Step 6: Final answer
x = 28,215,180.45
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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.