Finding the Fourth Proportional to 20,395,639.68, 28,147,628.24 and 11,694,621.84
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Solution
The fourth proportional to 20,395,639.68, 28,147,628.24 and 11,694,621.84 is: 16,139,521.64
Step by Step Solution
- Step 1: Write the proportion equation
20,395,639.68 : 28,147,628.24 = 11,694,621.84 : x - Step 2: Convert to fraction form
20,395,639.68/28,147,628.24 = 11,694,621.84/x - Step 3: Cross multiply
20,395,639.68x = 28,147,628.24 × 11,694,621.84 - Step 4: Simplify right side
20,395,639.68x = 329,175,867,959,704.75 - Step 5: Solve for x
x = 329,175,867,959,704.75/20,395,639.68 - Step 6: Final answer
x = 16,139,521.64
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.