Finding the Fourth Proportional to 18,947,178.91, 28,409,889.39 and 7,419,148.80
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Solution
The fourth proportional to 18,947,178.91, 28,409,889.39 and 7,419,148.80 is: 11,124,463.32
Step by Step Solution
- Step 1: Write the proportion equation
18,947,178.91 : 28,409,889.39 = 7,419,148.80 : x - Step 2: Convert to fraction form
18,947,178.91/28,409,889.39 = 7,419,148.80/x - Step 3: Cross multiply
18,947,178.91x = 28,409,889.39 × 7,419,148.80 - Step 4: Simplify right side
18,947,178.91x = 210,777,196,775,951.22 - Step 5: Solve for x
x = 210,777,196,775,951.22/18,947,178.91 - Step 6: Final answer
x = 11,124,463.32
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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.