Home / 13,720-20,680

Finding the Third Proportional to 13,720 and 20,680

Calculator

Solution

The third proportional to 13,720 and 20,680 is: 31,170.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720 : 20,680 = 20,680 : x
  2. Step 2: Convert to fraction form
    13,720/20,680 = 20,680/x
  3. Step 3: Cross multiply
    13,720x = 20,680 × 20,680
  4. Step 4: Simplify right side
    13,720x = 427,662,400
  5. Step 5: Solve for x
    x = 427,662,400/13,720
  6. Step 6: Final answer
    x = 31,170.73

Related Problems

Find third proportional to 6,860 and 10,340
Half scale
Find third proportional to 27,440 and 41,360
Double scale
Find third proportional to 13,722 and 20,683
Similar ratio
Find third proportional to 20,580 and 31,020
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.