Home / 20,920-29,821

Finding the Third Proportional to 20,920 and 29,821

Calculator

Solution

The third proportional to 20,920 and 29,821 is: 42,509.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920 : 29,821 = 29,821 : x
  2. Step 2: Convert to fraction form
    20,920/29,821 = 29,821/x
  3. Step 3: Cross multiply
    20,920x = 29,821 × 29,821
  4. Step 4: Simplify right side
    20,920x = 889,292,041
  5. Step 5: Solve for x
    x = 889,292,041/20,920
  6. Step 6: Final answer
    x = 42,509.18

Related Problems

Find third proportional to 10,460 and 14,910.50
Half scale
Find third proportional to 41,840 and 59,642
Double scale
Find third proportional to 20,922 and 29,824
Similar ratio
Find third proportional to 31,380 and 44,731.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.