Finding the Fourth Proportional to 21,420,799.80, 29,556,546.06 and 12,721,701.12
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Solution
The fourth proportional to 21,420,799.80, 29,556,546.06 and 12,721,701.12 is: 17,553,478.33
Step by Step Solution
- Step 1: Write the proportion equation
21,420,799.80 : 29,556,546.06 = 12,721,701.12 : x - Step 2: Convert to fraction form
21,420,799.80/29,556,546.06 = 12,721,701.12/x - Step 3: Cross multiply
21,420,799.80x = 29,556,546.06 × 12,721,701.12 - Step 4: Simplify right side
21,420,799.80x = 376,009,545,114,833.56 - Step 5: Solve for x
x = 376,009,545,114,833.56/21,420,799.80 - Step 6: Final answer
x = 17,553,478.33
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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.