Finding the Fourth Proportional to 13,850.55, 19,115.40 and 7,800.99
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Solution
The fourth proportional to 13,850.55, 19,115.40 and 7,800.99 is: 10,766.29
Step by Step Solution
- Step 1: Write the proportion equation
13,850.55 : 19,115.40 = 7,800.99 : x - Step 2: Convert to fraction form
13,850.55/19,115.40 = 7,800.99/x - Step 3: Cross multiply
13,850.55x = 19,115.40 × 7,800.99 - Step 4: Simplify right side
13,850.55x = 149,119,044.25 - Step 5: Solve for x
x = 149,119,044.25/13,850.55 - Step 6: Final answer
x = 10,766.29
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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.