Finding the Fourth Proportional to 20,578,238.25, 28,398,490.20 and 11,286,178.26
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Solution
The fourth proportional to 20,578,238.25, 28,398,490.20 and 11,286,178.26 is: 15,575,211.97
Step by Step Solution
- Step 1: Write the proportion equation
20,578,238.25 : 28,398,490.20 = 11,286,178.26 : x - Step 2: Convert to fraction form
20,578,238.25/28,398,490.20 = 11,286,178.26/x - Step 3: Cross multiply
20,578,238.25x = 28,398,490.20 × 11,286,178.26 - Step 4: Simplify right side
20,578,238.25x = 320,510,422,712,063.06 - Step 5: Solve for x
x = 320,510,422,712,063.06/20,578,238.25 - Step 6: Final answer
x = 15,575,211.97
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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.