Finding the Fourth Proportional to 21,420,798.80, 29,556,544.68 and 12,721,700.12
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Solution
The fourth proportional to 21,420,798.80, 29,556,544.68 and 12,721,700.12 is: 17,553,476.95
Step by Step Solution
- Step 1: Write the proportion equation
21,420,798.80 : 29,556,544.68 = 12,721,700.12 : x - Step 2: Convert to fraction form
21,420,798.80/29,556,544.68 = 12,721,700.12/x - Step 3: Cross multiply
21,420,798.80x = 29,556,544.68 × 12,721,700.12 - Step 4: Simplify right side
21,420,798.80x = 376,009,497,854,558.62 - Step 5: Solve for x
x = 376,009,497,854,558.62/21,420,798.80 - Step 6: Final answer
x = 17,553,476.95
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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.