Home / 13-13.25

Finding the Third Proportional to 13 and 13.25

Calculator

Solution

The third proportional to 13 and 13.25 is: 13.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13 : 13.25 = 13.25 : x
  2. Step 2: Convert to fraction form
    13/13.25 = 13.25/x
  3. Step 3: Cross multiply
    13x = 13.25 × 13.25
  4. Step 4: Simplify right side
    13x = 175.56
  5. Step 5: Solve for x
    x = 175.56/13
  6. Step 6: Final answer
    x = 13.50

Related Problems

Find third proportional to 6.50 and 6.63
Half scale
Find third proportional to 26 and 26.50
Double scale
Find third proportional to 15 and 15
Similar ratio
Find third proportional to 19.50 and 19.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.