Home / 11,760-18,720

Finding the Third Proportional to 11,760 and 18,720

Calculator

Solution

The third proportional to 11,760 and 18,720 is: 29,799.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,760 : 18,720 = 18,720 : x
  2. Step 2: Convert to fraction form
    11,760/18,720 = 18,720/x
  3. Step 3: Cross multiply
    11,760x = 18,720 × 18,720
  4. Step 4: Simplify right side
    11,760x = 350,438,400
  5. Step 5: Solve for x
    x = 350,438,400/11,760
  6. Step 6: Final answer
    x = 29,799.18

Related Problems

Find third proportional to 5,880 and 9,360
Half scale
Find third proportional to 23,520 and 37,440
Double scale
Find third proportional to 11,762 and 18,723
Similar ratio
Find third proportional to 17,640 and 28,080
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.