Home / 28-28.75

Finding the Third Proportional to 28 and 28.75

Calculator

Solution

The third proportional to 28 and 28.75 is: 29.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28 : 28.75 = 28.75 : x
  2. Step 2: Convert to fraction form
    28/28.75 = 28.75/x
  3. Step 3: Cross multiply
    28x = 28.75 × 28.75
  4. Step 4: Simplify right side
    28x = 826.56
  5. Step 5: Solve for x
    x = 826.56/28
  6. Step 6: Final answer
    x = 29.52

Related Problems

Find third proportional to 14 and 14.38
Half scale
Find third proportional to 56 and 57.50
Double scale
Find third proportional to 30 and 31
Similar ratio
Find third proportional to 42 and 43.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.