Finding the Fourth Proportional to 18,392,639.20, 27,588,958.80 and 10,430,015.20
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Solution
The fourth proportional to 18,392,639.20, 27,588,958.80 and 10,430,015.20 is: 15,645,022.80
Step by Step Solution
- Step 1: Write the proportion equation
18,392,639.20 : 27,588,958.80 = 10,430,015.20 : x - Step 2: Convert to fraction form
18,392,639.20/27,588,958.80 = 10,430,015.20/x - Step 3: Cross multiply
18,392,639.20x = 27,588,958.80 × 10,430,015.20 - Step 4: Simplify right side
18,392,639.20x = 287,753,259,636,173.75 - Step 5: Solve for x
x = 287,753,259,636,173.75/18,392,639.20 - Step 6: Final answer
x = 15,645,022.80
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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.