Finding the Fourth Proportional to 20,386,475.97, 28,133,341.49 and 11,219,118.72
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Solution
The fourth proportional to 20,386,475.97, 28,133,341.49 and 11,219,118.72 is: 15,482,386.39
Step by Step Solution
- Step 1: Write the proportion equation
20,386,475.97 : 28,133,341.49 = 11,219,118.72 : x - Step 2: Convert to fraction form
20,386,475.97/28,133,341.49 = 11,219,118.72/x - Step 3: Cross multiply
20,386,475.97x = 28,133,341.49 × 11,219,118.72 - Step 4: Simplify right side
20,386,475.97x = 315,631,298,184,302 - Step 5: Solve for x
x = 315,631,298,184,302/20,386,475.97 - Step 6: Final answer
x = 15,482,386.39
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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.