Finding the Fourth Proportional to 19,981.18, 27,580.36 and 12,423.05
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Solution
The fourth proportional to 19,981.18, 27,580.36 and 12,423.05 is: 17,147.75
Step by Step Solution
- Step 1: Write the proportion equation
19,981.18 : 27,580.36 = 12,423.05 : x - Step 2: Convert to fraction form
19,981.18/27,580.36 = 12,423.05/x - Step 3: Cross multiply
19,981.18x = 27,580.36 × 12,423.05 - Step 4: Simplify right side
19,981.18x = 342,632,191.30 - Step 5: Solve for x
x = 342,632,191.30/19,981.18 - Step 6: Final answer
x = 17,147.75
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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.