Finding the Fourth Proportional to 18,432,820.80, 27,649,231.20 and 12,759,451.20
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Solution
The fourth proportional to 18,432,820.80, 27,649,231.20 and 12,759,451.20 is: 19,139,176.80
Step by Step Solution
- Step 1: Write the proportion equation
18,432,820.80 : 27,649,231.20 = 12,759,451.20 : x - Step 2: Convert to fraction form
18,432,820.80/27,649,231.20 = 12,759,451.20/x - Step 3: Cross multiply
18,432,820.80x = 27,649,231.20 × 12,759,451.20 - Step 4: Simplify right side
18,432,820.80x = 352,789,016,213,917.44 - Step 5: Solve for x
x = 352,789,016,213,917.44/18,432,820.80 - Step 6: Final answer
x = 19,139,176.80
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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.