Finding the Fourth Proportional to 18,961.99, 28,442.93 and 5,110.99
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Solution
The fourth proportional to 18,961.99, 28,442.93 and 5,110.99 is: 7,666.47
Step by Step Solution
- Step 1: Write the proportion equation
18,961.99 : 28,442.93 = 5,110.99 : x - Step 2: Convert to fraction form
18,961.99/28,442.93 = 5,110.99/x - Step 3: Cross multiply
18,961.99x = 28,442.93 × 5,110.99 - Step 4: Simplify right side
18,961.99x = 145,371,530.80 - Step 5: Solve for x
x = 145,371,530.80/18,961.99 - Step 6: Final answer
x = 7,666.47
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Double scale
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Similar ratio
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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.