Finding the Fourth Proportional to 19,979.71, 29,971.19 and 6,652.23
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Solution
The fourth proportional to 19,979.71, 29,971.19 and 6,652.23 is: 9,978.88
Step by Step Solution
- Step 1: Write the proportion equation
19,979.71 : 29,971.19 = 6,652.23 : x - Step 2: Convert to fraction form
19,979.71/29,971.19 = 6,652.23/x - Step 3: Cross multiply
19,979.71x = 29,971.19 × 6,652.23 - Step 4: Simplify right side
19,979.71x = 199,375,134.78 - Step 5: Solve for x
x = 199,375,134.78/19,979.71 - Step 6: Final answer
x = 9,978.88
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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.