Home / 28.16-43.21

Finding the Third Proportional to 28.16 and 43.21

Calculator

Solution

The third proportional to 28.16 and 43.21 is: 66.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.16 : 43.21 = 43.21 : x
  2. Step 2: Convert to fraction form
    28.16/43.21 = 43.21/x
  3. Step 3: Cross multiply
    28.16x = 43.21 × 43.21
  4. Step 4: Simplify right side
    28.16x = 1,866.85
  5. Step 5: Solve for x
    x = 1,866.85/28.16
  6. Step 6: Final answer
    x = 66.29

Related Problems

Find third proportional to 14.08 and 21.60
Half scale
Find third proportional to 56.32 and 86.41
Double scale
Find third proportional to 30 and 46
Similar ratio
Find third proportional to 42.24 and 64.81
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.