Finding the Fourth Proportional to 11,979.12, 17,968.76 and 3,660.42
Calculator
Solution
The fourth proportional to 11,979.12, 17,968.76 and 3,660.42 is: 5,490.65
Step by Step Solution
- Step 1: Write the proportion equation
11,979.12 : 17,968.76 = 3,660.42 : x - Step 2: Convert to fraction form
11,979.12/17,968.76 = 3,660.42/x - Step 3: Cross multiply
11,979.12x = 17,968.76 × 3,660.42 - Step 4: Simplify right side
11,979.12x = 65,773,208.48 - Step 5: Solve for x
x = 65,773,208.48/11,979.12 - Step 6: Final answer
x = 5,490.65
Related Problems
Find fourth proportional to 5,989.56, 8,984.38 and 1,830.21
Half scale
Find fourth proportional to 23,958.24, 35,937.52 and 7,320.84
Double scale
Find fourth proportional to 11,980.12, 17,970.26 and 3,661.42
Similar ratio
Find fourth proportional to 17,968.68, 26,953.14 and 5,490.63
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.