Finding the Fourth Proportional to 20,386,475.05, 28,133,340.21 and 11,219,117.80
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Solution
The fourth proportional to 20,386,475.05, 28,133,340.21 and 11,219,117.80 is: 15,482,385.12
Step by Step Solution
- Step 1: Write the proportion equation
20,386,475.05 : 28,133,340.21 = 11,219,117.80 : x - Step 2: Convert to fraction form
20,386,475.05/28,133,340.21 = 11,219,117.80/x - Step 3: Cross multiply
20,386,475.05x = 28,133,340.21 × 11,219,117.80 - Step 4: Simplify right side
20,386,475.05x = 315,631,257,895,418.94 - Step 5: Solve for x
x = 315,631,257,895,418.94/20,386,475.05 - Step 6: Final answer
x = 15,482,385.12
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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.