Home / 20,120-30,360

Finding the Third Proportional to 20,120 and 30,360

Calculator

Solution

The third proportional to 20,120 and 30,360 is: 45,811.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120 : 30,360 = 30,360 : x
  2. Step 2: Convert to fraction form
    20,120/30,360 = 30,360/x
  3. Step 3: Cross multiply
    20,120x = 30,360 × 30,360
  4. Step 4: Simplify right side
    20,120x = 921,729,600
  5. Step 5: Solve for x
    x = 921,729,600/20,120
  6. Step 6: Final answer
    x = 45,811.61

Related Problems

Find third proportional to 10,060 and 15,180
Half scale
Find third proportional to 40,240 and 60,720
Double scale
Find third proportional to 20,122 and 30,363
Similar ratio
Find third proportional to 30,180 and 45,540
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.