Finding the Fourth Proportional to 21,053,828.79, 29,052,662.18 and 11,887,376.31
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Solution
The fourth proportional to 21,053,828.79, 29,052,662.18 and 11,887,376.31 is: 16,403,663.75
Step by Step Solution
- Step 1: Write the proportion equation
21,053,828.79 : 29,052,662.18 = 11,887,376.31 : x - Step 2: Convert to fraction form
21,053,828.79/29,052,662.18 = 11,887,376.31/x - Step 3: Cross multiply
21,053,828.79x = 29,052,662.18 × 11,887,376.31 - Step 4: Simplify right side
21,053,828.79x = 345,359,928,081,528.12 - Step 5: Solve for x
x = 345,359,928,081,528.12/21,053,828.79 - Step 6: Final answer
x = 16,403,663.75
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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.