Home / 8,720-13,188

Finding the Third Proportional to 8,720 and 13,188

Calculator

Solution

The third proportional to 8,720 and 13,188 is: 19,945.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720 : 13,188 = 13,188 : x
  2. Step 2: Convert to fraction form
    8,720/13,188 = 13,188/x
  3. Step 3: Cross multiply
    8,720x = 13,188 × 13,188
  4. Step 4: Simplify right side
    8,720x = 173,923,344
  5. Step 5: Solve for x
    x = 173,923,344/8,720
  6. Step 6: Final answer
    x = 19,945.34

Related Problems

Find third proportional to 4,360 and 6,594
Half scale
Find third proportional to 17,440 and 26,376
Double scale
Find third proportional to 8,722 and 13,191
Similar ratio
Find third proportional to 13,080 and 19,782
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.