Finding the Fourth Proportional to 20,804,919.80, 31,207,379.70 and 18,285,495.80
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Solution
The fourth proportional to 20,804,919.80, 31,207,379.70 and 18,285,495.80 is: 27,428,243.70
Step by Step Solution
- Step 1: Write the proportion equation
20,804,919.80 : 31,207,379.70 = 18,285,495.80 : x - Step 2: Convert to fraction form
20,804,919.80/31,207,379.70 = 18,285,495.80/x - Step 3: Cross multiply
20,804,919.80x = 31,207,379.70 × 18,285,495.80 - Step 4: Simplify right side
20,804,919.80x = 570,642,410,433,355.25 - Step 5: Solve for x
x = 570,642,410,433,355.25/20,804,919.80 - Step 6: Final answer
x = 27,428,243.70
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1.5x scale
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.