Home / 16.25-21

Finding the Third Proportional to 16.25 and 21

Calculator

Solution

The third proportional to 16.25 and 21 is: 27.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.25 : 21 = 21 : x
  2. Step 2: Convert to fraction form
    16.25/21 = 21/x
  3. Step 3: Cross multiply
    16.25x = 21 × 21
  4. Step 4: Simplify right side
    16.25x = 441
  5. Step 5: Solve for x
    x = 441/16.25
  6. Step 6: Final answer
    x = 27.14

Related Problems

Find third proportional to 8.13 and 10.50
Half scale
Find third proportional to 32.50 and 42
Double scale
Find third proportional to 18 and 24
Similar ratio
Find third proportional to 24.38 and 31.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.