Finding the Fourth Proportional to 31,419.24, 47,128.86 and 19,740.66
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Solution
The fourth proportional to 31,419.24, 47,128.86 and 19,740.66 is: 29,610.99
Step by Step Solution
- Step 1: Write the proportion equation
31,419.24 : 47,128.86 = 19,740.66 : x - Step 2: Convert to fraction form
31,419.24/47,128.86 = 19,740.66/x - Step 3: Cross multiply
31,419.24x = 47,128.86 × 19,740.66 - Step 4: Simplify right side
31,419.24x = 930,354,801.45 - Step 5: Solve for x
x = 930,354,801.45/31,419.24 - Step 6: Final answer
x = 29,610.99
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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.