Finding the Fourth Proportional to 40.04, 60.05 and 12.99
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Solution
The fourth proportional to 40.04, 60.05 and 12.99 is: 19.48
Step by Step Solution
- Step 1: Write the proportion equation
40.04 : 60.05 = 12.99 : x - Step 2: Convert to fraction form
40.04/60.05 = 12.99/x - Step 3: Cross multiply
40.04x = 60.05 × 12.99 - Step 4: Simplify right side
40.04x = 779.86 - Step 5: Solve for x
x = 779.86/40.04 - Step 6: Final answer
x = 19.48
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Double scale
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Similar ratio
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1.5x scale
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.