Home / 21,128-26,828

Finding the Third Proportional to 21,128 and 26,828

Calculator

Solution

The third proportional to 21,128 and 26,828 is: 34,065.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128 : 26,828 = 26,828 : x
  2. Step 2: Convert to fraction form
    21,128/26,828 = 26,828/x
  3. Step 3: Cross multiply
    21,128x = 26,828 × 26,828
  4. Step 4: Simplify right side
    21,128x = 719,741,584
  5. Step 5: Solve for x
    x = 719,741,584/21,128
  6. Step 6: Final answer
    x = 34,065.77

Related Problems

Find third proportional to 10,564 and 13,414
Half scale
Find third proportional to 42,256 and 53,656
Double scale
Find third proportional to 21,130 and 26,831
Similar ratio
Find third proportional to 31,692 and 40,242
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.