Home / 13,660-21,720

Finding the Third Proportional to 13,660 and 21,720

Calculator

Solution

The third proportional to 13,660 and 21,720 is: 34,535.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,660 : 21,720 = 21,720 : x
  2. Step 2: Convert to fraction form
    13,660/21,720 = 21,720/x
  3. Step 3: Cross multiply
    13,660x = 21,720 × 21,720
  4. Step 4: Simplify right side
    13,660x = 471,758,400
  5. Step 5: Solve for x
    x = 471,758,400/13,660
  6. Step 6: Final answer
    x = 34,535.75

Related Problems

Find third proportional to 6,830 and 10,860
Half scale
Find third proportional to 27,320 and 43,440
Double scale
Find third proportional to 13,662 and 21,723
Similar ratio
Find third proportional to 20,490 and 32,580
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.