Finding the Fourth Proportional to 20,231,112.12, 27,921,485.21 and 13,267,645.80
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Solution
The fourth proportional to 20,231,112.12, 27,921,485.21 and 13,267,645.80 is: 18,311,023.82
Step by Step Solution
- Step 1: Write the proportion equation
20,231,112.12 : 27,921,485.21 = 13,267,645.80 : x - Step 2: Convert to fraction form
20,231,112.12/27,921,485.21 = 13,267,645.80/x - Step 3: Cross multiply
20,231,112.12x = 27,921,485.21 × 13,267,645.80 - Step 4: Simplify right side
20,231,112.12x = 370,452,375,909,880.38 - Step 5: Solve for x
x = 370,452,375,909,880.38/20,231,112.12 - Step 6: Final answer
x = 18,311,023.82
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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.