Finding the Fourth Proportional to 21,720,799.20, 29,972,954.16 and 12,554,035.68
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Solution
The fourth proportional to 21,720,799.20, 29,972,954.16 and 12,554,035.68 is: 17,323,558.52
Step by Step Solution
- Step 1: Write the proportion equation
21,720,799.20 : 29,972,954.16 = 12,554,035.68 : x - Step 2: Convert to fraction form
21,720,799.20/29,972,954.16 = 12,554,035.68/x - Step 3: Cross multiply
21,720,799.20x = 29,972,954.16 × 12,554,035.68 - Step 4: Simplify right side
21,720,799.20x = 376,281,535,959,644.44 - Step 5: Solve for x
x = 376,281,535,959,644.44/21,720,799.20 - Step 6: Final answer
x = 17,323,558.52
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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.