Finding the Fourth Proportional to 20,987,145.66, 31,481,844.80 and 6,611,338.56
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Solution
The fourth proportional to 20,987,145.66, 31,481,844.80 and 6,611,338.56 is: 9,917,362.65
Step by Step Solution
- Step 1: Write the proportion equation
20,987,145.66 : 31,481,844.80 = 6,611,338.56 : x - Step 2: Convert to fraction form
20,987,145.66/31,481,844.80 = 6,611,338.56/x - Step 3: Cross multiply
20,987,145.66x = 31,481,844.80 × 6,611,338.56 - Step 4: Simplify right side
20,987,145.66x = 208,137,134,433,118.78 - Step 5: Solve for x
x = 208,137,134,433,118.78/20,987,145.66 - Step 6: Final answer
x = 9,917,362.65
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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.