Finding the Fourth Proportional to 20,278,344.80, 27,985,236.40 and 11,579,311.68
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Solution
The fourth proportional to 20,278,344.80, 27,985,236.40 and 11,579,311.68 is: 15,980,089.99
Step by Step Solution
- Step 1: Write the proportion equation
20,278,344.80 : 27,985,236.40 = 11,579,311.68 : x - Step 2: Convert to fraction form
20,278,344.80/27,985,236.40 = 11,579,311.68/x - Step 3: Cross multiply
20,278,344.80x = 27,985,236.40 × 11,579,311.68 - Step 4: Simplify right side
20,278,344.80x = 324,049,774,714,081.12 - Step 5: Solve for x
x = 324,049,774,714,081.12/20,278,344.80 - Step 6: Final answer
x = 15,980,089.99
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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.