Finding the Fourth Proportional to 13,740.68, 18,958.99 and 7,771.05
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Solution
The fourth proportional to 13,740.68, 18,958.99 and 7,771.05 is: 10,722.27
Step by Step Solution
- Step 1: Write the proportion equation
13,740.68 : 18,958.99 = 7,771.05 : x - Step 2: Convert to fraction form
13,740.68/18,958.99 = 7,771.05/x - Step 3: Cross multiply
13,740.68x = 18,958.99 × 7,771.05 - Step 4: Simplify right side
13,740.68x = 147,331,259.24 - Step 5: Solve for x
x = 147,331,259.24/13,740.68 - Step 6: Final answer
x = 10,722.27
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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.