Finding the Fourth Proportional to 20,776,939.80, 31,165,409.70 and 15,738,091.80
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Solution
The fourth proportional to 20,776,939.80, 31,165,409.70 and 15,738,091.80 is: 23,607,137.70
Step by Step Solution
- Step 1: Write the proportion equation
20,776,939.80 : 31,165,409.70 = 15,738,091.80 : x - Step 2: Convert to fraction form
20,776,939.80/31,165,409.70 = 15,738,091.80/x - Step 3: Cross multiply
20,776,939.80x = 31,165,409.70 × 15,738,091.80 - Step 4: Simplify right side
20,776,939.80x = 490,484,078,843,210.50 - Step 5: Solve for x
x = 490,484,078,843,210.50/20,776,939.80 - Step 6: Final answer
x = 23,607,137.70
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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.