Finding the Fourth Proportional to 8,718.31, 12,043.53 and 7,930.99
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Solution
The fourth proportional to 8,718.31, 12,043.53 and 7,930.99 is: 10,955.92
Step by Step Solution
- Step 1: Write the proportion equation
8,718.31 : 12,043.53 = 7,930.99 : x - Step 2: Convert to fraction form
8,718.31/12,043.53 = 7,930.99/x - Step 3: Cross multiply
8,718.31x = 12,043.53 × 7,930.99 - Step 4: Simplify right side
8,718.31x = 95,517,115.99 - Step 5: Solve for x
x = 95,517,115.99/8,718.31 - Step 6: Final answer
x = 10,955.92
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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.