Finding the Fourth Proportional to 21,651,138.08, 29,878,560.19 and 12,949,310.51
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Solution
The fourth proportional to 21,651,138.08, 29,878,560.19 and 12,949,310.51 is: 17,870,042.31
Step by Step Solution
- Step 1: Write the proportion equation
21,651,138.08 : 29,878,560.19 = 12,949,310.51 : x - Step 2: Convert to fraction form
21,651,138.08/29,878,560.19 = 12,949,310.51/x - Step 3: Cross multiply
21,651,138.08x = 29,878,560.19 × 12,949,310.51 - Step 4: Simplify right side
21,651,138.08x = 386,906,753,470,873 - Step 5: Solve for x
x = 386,906,753,470,873/21,651,138.08 - Step 6: Final answer
x = 17,870,042.31
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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.