Home / 15,210-20,345

Finding the Third Proportional to 15,210 and 20,345

Calculator

Solution

The third proportional to 15,210 and 20,345 is: 27,213.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,210 : 20,345 = 20,345 : x
  2. Step 2: Convert to fraction form
    15,210/20,345 = 20,345/x
  3. Step 3: Cross multiply
    15,210x = 20,345 × 20,345
  4. Step 4: Simplify right side
    15,210x = 413,919,025
  5. Step 5: Solve for x
    x = 413,919,025/15,210
  6. Step 6: Final answer
    x = 27,213.61

Related Problems

Find third proportional to 7,605 and 10,172.50
Half scale
Find third proportional to 30,420 and 40,690
Double scale
Find third proportional to 15,212 and 20,348
Similar ratio
Find third proportional to 22,815 and 30,517.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.