Finding the Fourth Proportional to 30,785,615.93, 42,477,403.89 and 18,393,847.94
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Solution
The fourth proportional to 30,785,615.93, 42,477,403.89 and 18,393,847.94 is: 25,379,479.49
Step by Step Solution
- Step 1: Write the proportion equation
30,785,615.93 : 42,477,403.89 = 18,393,847.94 : x - Step 2: Convert to fraction form
30,785,615.93/42,477,403.89 = 18,393,847.94/x - Step 3: Cross multiply
30,785,615.93x = 42,477,403.89 × 18,393,847.94 - Step 4: Simplify right side
30,785,615.93x = 781,322,908,213,794.88 - Step 5: Solve for x
x = 781,322,908,213,794.88/30,785,615.93 - Step 6: Final answer
x = 25,379,479.49
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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.