Finding the Fourth Proportional to 18,703,840.80, 28,040,209.20 and 7,929,415.20
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Solution
The fourth proportional to 18,703,840.80, 28,040,209.20 and 7,929,415.20 is: 11,887,529.59
Step by Step Solution
- Step 1: Write the proportion equation
18,703,840.80 : 28,040,209.20 = 7,929,415.20 : x - Step 2: Convert to fraction form
18,703,840.80/28,040,209.20 = 7,929,415.20/x - Step 3: Cross multiply
18,703,840.80x = 28,040,209.20 × 7,929,415.20 - Step 4: Simplify right side
18,703,840.80x = 222,342,461,041,659.84 - Step 5: Solve for x
x = 222,342,461,041,659.84/18,703,840.80 - Step 6: Final answer
x = 11,887,529.59
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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.