Finding the Fourth Proportional to 38.90, 53.70 and 27.99
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Solution
The fourth proportional to 38.90, 53.70 and 27.99 is: 38.64
Step by Step Solution
- Step 1: Write the proportion equation
38.90 : 53.70 = 27.99 : x - Step 2: Convert to fraction form
38.90/53.70 = 27.99/x - Step 3: Cross multiply
38.90x = 53.70 × 27.99 - Step 4: Simplify right side
38.90x = 1,503.06 - Step 5: Solve for x
x = 1,503.06/38.90 - Step 6: Final answer
x = 38.64
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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.