Finding the Fourth Proportional to 21,135,912.05, 29,167,562.90 and 12,875,971.84
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Solution
The fourth proportional to 21,135,912.05, 29,167,562.90 and 12,875,971.84 is: 17,768,843.74
Step by Step Solution
- Step 1: Write the proportion equation
21,135,912.05 : 29,167,562.90 = 12,875,971.84 : x - Step 2: Convert to fraction form
21,135,912.05/29,167,562.90 = 12,875,971.84/x - Step 3: Cross multiply
21,135,912.05x = 29,167,562.90 × 12,875,971.84 - Step 4: Simplify right side
21,135,912.05x = 375,560,718,541,828.69 - Step 5: Solve for x
x = 375,560,718,541,828.69/21,135,912.05 - Step 6: Final answer
x = 17,768,843.74
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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.