Finding the Fourth Proportional to 30,690,992.21, 42,347,246.84 and 17,635,728.85
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Solution
The fourth proportional to 30,690,992.21, 42,347,246.84 and 17,635,728.85 is: 24,333,672.82
Step by Step Solution
- Step 1: Write the proportion equation
30,690,992.21 : 42,347,246.84 = 17,635,728.85 : x - Step 2: Convert to fraction form
30,690,992.21/42,347,246.84 = 17,635,728.85/x - Step 3: Cross multiply
30,690,992.21x = 42,347,246.84 × 17,635,728.85 - Step 4: Simplify right side
30,690,992.21x = 746,824,562,948,172.12 - Step 5: Solve for x
x = 746,824,562,948,172.12/30,690,992.21 - Step 6: Final answer
x = 24,333,672.82
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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.