Home / 20,430-41,720

Finding the Third Proportional to 20,430 and 41,720

Calculator

Solution

The third proportional to 20,430 and 41,720 is: 85,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430 : 41,720 = 41,720 : x
  2. Step 2: Convert to fraction form
    20,430/41,720 = 41,720/x
  3. Step 3: Cross multiply
    20,430x = 41,720 × 41,720
  4. Step 4: Simplify right side
    20,430x = 1,740,558,400
  5. Step 5: Solve for x
    x = 1,740,558,400/20,430
  6. Step 6: Final answer
    x = 85,196.20

Related Problems

Find third proportional to 10,215 and 20,860
Half scale
Find third proportional to 40,860 and 83,440
Double scale
Find third proportional to 20,432 and 41,724
Similar ratio
Find third proportional to 30,645 and 62,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.