Finding the Fourth Proportional to 18,972.44, 28,455.99 and 11,930.99
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Solution
The fourth proportional to 18,972.44, 28,455.99 and 11,930.99 is: 17,894.80
Step by Step Solution
- Step 1: Write the proportion equation
18,972.44 : 28,455.99 = 11,930.99 : x - Step 2: Convert to fraction form
18,972.44/28,455.99 = 11,930.99/x - Step 3: Cross multiply
18,972.44x = 28,455.99 × 11,930.99 - Step 4: Simplify right side
18,972.44x = 339,508,172.29 - Step 5: Solve for x
x = 339,508,172.29/18,972.44 - Step 6: Final answer
x = 17,894.80
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1.5x scale
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.