Finding the Fourth Proportional to 20,405,647.62, 28,126,973.12 and 13,788,170.19
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Solution
The fourth proportional to 20,405,647.62, 28,126,973.12 and 13,788,170.19 is: 19,005,497.86
Step by Step Solution
- Step 1: Write the proportion equation
20,405,647.62 : 28,126,973.12 = 13,788,170.19 : x - Step 2: Convert to fraction form
20,405,647.62/28,126,973.12 = 13,788,170.19/x - Step 3: Cross multiply
20,405,647.62x = 28,126,973.12 × 13,788,170.19 - Step 4: Simplify right side
20,405,647.62x = 387,819,492,239,174.38 - Step 5: Solve for x
x = 387,819,492,239,174.38/20,405,647.62 - Step 6: Final answer
x = 19,005,497.86
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1.5x scale
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.