Finding the Fourth Proportional to 20,186,489.80, 30,243,649.20 and 12,284,858.80
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Solution
The fourth proportional to 20,186,489.80, 30,243,649.20 and 12,284,858.80 is: 18,405,327.71
Step by Step Solution
- Step 1: Write the proportion equation
20,186,489.80 : 30,243,649.20 = 12,284,858.80 : x - Step 2: Convert to fraction form
20,186,489.80/30,243,649.20 = 12,284,858.80/x - Step 3: Cross multiply
20,186,489.80x = 30,243,649.20 × 12,284,858.80 - Step 4: Simplify right side
20,186,489.80x = 371,538,960,018,733 - Step 5: Solve for x
x = 371,538,960,018,733/20,186,489.80 - Step 6: Final answer
x = 18,405,327.71
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.