Finding the Fourth Proportional to 15,690,582.88, 21,632,202.80 and 12,889,182.96
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Solution
The fourth proportional to 15,690,582.88, 21,632,202.80 and 12,889,182.96 is: 17,769,984.83
Step by Step Solution
- Step 1: Write the proportion equation
15,690,582.88 : 21,632,202.80 = 12,889,182.96 : x - Step 2: Convert to fraction form
15,690,582.88/21,632,202.80 = 12,889,182.96/x - Step 3: Cross multiply
15,690,582.88x = 21,632,202.80 × 12,889,182.96 - Step 4: Simplify right side
15,690,582.88x = 278,821,419,717,024.31 - Step 5: Solve for x
x = 278,821,419,717,024.31/15,690,582.88 - Step 6: Final answer
x = 17,769,984.83
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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.