Finding the Fourth Proportional to 30,699,990.58, 42,385,106.79 and 19,542,778.91
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Solution
The fourth proportional to 30,699,990.58, 42,385,106.79 and 19,542,778.91 is: 26,981,206.03
Step by Step Solution
- Step 1: Write the proportion equation
30,699,990.58 : 42,385,106.79 = 19,542,778.91 : x - Step 2: Convert to fraction form
30,699,990.58/42,385,106.79 = 19,542,778.91/x - Step 3: Cross multiply
30,699,990.58x = 42,385,106.79 × 19,542,778.91 - Step 4: Simplify right side
30,699,990.58x = 828,322,770,972,593 - Step 5: Solve for x
x = 828,322,770,972,593/30,699,990.58 - Step 6: Final answer
x = 26,981,206.03
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1.5x scale
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.