Finding the Fourth Proportional to 31,040,926.51, 42,829,722.79 and 18,820,786.99
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Solution
The fourth proportional to 31,040,926.51, 42,829,722.79 and 18,820,786.99 is: 25,968,589.86
Step by Step Solution
- Step 1: Write the proportion equation
31,040,926.51 : 42,829,722.79 = 18,820,786.99 : x - Step 2: Convert to fraction form
31,040,926.51/42,829,722.79 = 18,820,786.99/x - Step 3: Cross multiply
31,040,926.51x = 42,829,722.79 × 18,820,786.99 - Step 4: Simplify right side
31,040,926.51x = 806,089,089,471,338.38 - Step 5: Solve for x
x = 806,089,089,471,338.38/31,040,926.51 - Step 6: Final answer
x = 25,968,589.86
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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.