Finding the Fourth Proportional to 20,921,330.97, 28,879,268.49 and 15,709,395.24
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Solution
The fourth proportional to 20,921,330.97, 28,879,268.49 and 15,709,395.24 is: 21,684,846.13
Step by Step Solution
- Step 1: Write the proportion equation
20,921,330.97 : 28,879,268.49 = 15,709,395.24 : x - Step 2: Convert to fraction form
20,921,330.97/28,879,268.49 = 15,709,395.24/x - Step 3: Cross multiply
20,921,330.97x = 28,879,268.49 × 15,709,395.24 - Step 4: Simplify right side
20,921,330.97x = 453,675,842,951,487.94 - Step 5: Solve for x
x = 453,675,842,951,487.94/20,921,330.97 - Step 6: Final answer
x = 21,684,846.13
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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.