Finding the Fourth Proportional to 18,689,977.60, 27,990,729.60 and 12,673,772.80
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Solution
The fourth proportional to 18,689,977.60, 27,990,729.60 and 12,673,772.80 is: 18,980,661.99
Step by Step Solution
- Step 1: Write the proportion equation
18,689,977.60 : 27,990,729.60 = 12,673,772.80 : x - Step 2: Convert to fraction form
18,689,977.60/27,990,729.60 = 12,673,772.80/x - Step 3: Cross multiply
18,689,977.60x = 27,990,729.60 × 12,673,772.80 - Step 4: Simplify right side
18,689,977.60x = 354,748,147,456,634.94 - Step 5: Solve for x
x = 354,748,147,456,634.94/18,689,977.60 - Step 6: Final answer
x = 18,980,661.99
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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.