Home / 13,640-20,864

Finding the Third Proportional to 13,640 and 20,864

Calculator

Solution

The third proportional to 13,640 and 20,864 is: 31,913.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640 : 20,864 = 20,864 : x
  2. Step 2: Convert to fraction form
    13,640/20,864 = 20,864/x
  3. Step 3: Cross multiply
    13,640x = 20,864 × 20,864
  4. Step 4: Simplify right side
    13,640x = 435,306,496
  5. Step 5: Solve for x
    x = 435,306,496/13,640
  6. Step 6: Final answer
    x = 31,913.97

Related Problems

Find third proportional to 6,820 and 10,432
Half scale
Find third proportional to 27,280 and 41,728
Double scale
Find third proportional to 13,642 and 20,867
Similar ratio
Find third proportional to 20,460 and 31,296
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.