Finding the Fourth Proportional to 21,679.52, 29,915.33 and 12,248.08
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Solution
The fourth proportional to 21,679.52, 29,915.33 and 12,248.08 is: 16,900.99
Step by Step Solution
- Step 1: Write the proportion equation
21,679.52 : 29,915.33 = 12,248.08 : x - Step 2: Convert to fraction form
21,679.52/29,915.33 = 12,248.08/x - Step 3: Cross multiply
21,679.52x = 29,915.33 × 12,248.08 - Step 4: Simplify right side
21,679.52x = 366,405,219.04 - Step 5: Solve for x
x = 366,405,219.04/21,679.52 - Step 6: Final answer
x = 16,900.99
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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.