Finding the Fourth Proportional to 12.99, 19.44 and 6.99
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Solution
The fourth proportional to 12.99, 19.44 and 6.99 is: 10.45
Step by Step Solution
- Step 1: Write the proportion equation
12.99 : 19.44 = 6.99 : x - Step 2: Convert to fraction form
12.99/19.44 = 6.99/x - Step 3: Cross multiply
12.99x = 19.44 × 6.99 - Step 4: Simplify right side
12.99x = 135.81 - Step 5: Solve for x
x = 135.81/12.99 - Step 6: Final answer
x = 10.45
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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.