Finding the Fourth Proportional to 20,567.81, 30,851.72 and 7,419.99
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Solution
The fourth proportional to 20,567.81, 30,851.72 and 7,419.99 is: 11,129.99
Step by Step Solution
- Step 1: Write the proportion equation
20,567.81 : 30,851.72 = 7,419.99 : x - Step 2: Convert to fraction form
20,567.81/30,851.72 = 7,419.99/x - Step 3: Cross multiply
20,567.81x = 30,851.72 × 7,419.99 - Step 4: Simplify right side
20,567.81x = 228,919,416.78 - Step 5: Solve for x
x = 228,919,416.78/20,567.81 - Step 6: Final answer
x = 11,129.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.