Finding the Fourth Proportional to 40.41, 55.76 and 21.99
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Solution
The fourth proportional to 40.41, 55.76 and 21.99 is: 30.34
Step by Step Solution
- Step 1: Write the proportion equation
40.41 : 55.76 = 21.99 : x - Step 2: Convert to fraction form
40.41/55.76 = 21.99/x - Step 3: Cross multiply
40.41x = 55.76 × 21.99 - Step 4: Simplify right side
40.41x = 1,225.97 - Step 5: Solve for x
x = 1,225.97/40.41 - Step 6: Final answer
x = 30.34
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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.