Finding the Fourth Proportional to 20,543,947.38, 28,350,621.81 and 11,376,579.06
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Solution
The fourth proportional to 20,543,947.38, 28,350,621.81 and 11,376,579.06 is: 15,699,664.94
Step by Step Solution
- Step 1: Write the proportion equation
20,543,947.38 : 28,350,621.81 = 11,376,579.06 : x - Step 2: Convert to fraction form
20,543,947.38/28,350,621.81 = 11,376,579.06/x - Step 3: Cross multiply
20,543,947.38x = 28,350,621.81 × 11,376,579.06 - Step 4: Simplify right side
20,543,947.38x = 322,533,090,421,625.31 - Step 5: Solve for x
x = 322,533,090,421,625.31/20,543,947.38 - Step 6: Final answer
x = 15,699,664.94
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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.