Finding the Fourth Proportional to 19,163.80, 28,745.70 and 10,415.80
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Solution
The fourth proportional to 19,163.80, 28,745.70 and 10,415.80 is: 15,623.70
Step by Step Solution
- Step 1: Write the proportion equation
19,163.80 : 28,745.70 = 10,415.80 : x - Step 2: Convert to fraction form
19,163.80/28,745.70 = 10,415.80/x - Step 3: Cross multiply
19,163.80x = 28,745.70 × 10,415.80 - Step 4: Simplify right side
19,163.80x = 299,409,462.06 - Step 5: Solve for x
x = 299,409,462.06/19,163.80 - Step 6: Final answer
x = 15,623.70
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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.