Finding the Fourth Proportional to 20,440,128.66, 28,207,405.53 and 11,147,721.18
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Solution
The fourth proportional to 20,440,128.66, 28,207,405.53 and 11,147,721.18 is: 15,383,870.49
Step by Step Solution
- Step 1: Write the proportion equation
20,440,128.66 : 28,207,405.53 = 11,147,721.18 : x - Step 2: Convert to fraction form
20,440,128.66/28,207,405.53 = 11,147,721.18/x - Step 3: Cross multiply
20,440,128.66x = 28,207,405.53 × 11,147,721.18 - Step 4: Simplify right side
20,440,128.66x = 314,448,292,059,630.12 - Step 5: Solve for x
x = 314,448,292,059,630.12/20,440,128.66 - Step 6: Final answer
x = 15,383,870.49
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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.