Home / 17.31-31

Finding the Third Proportional to 17.31 and 31

Calculator

Solution

The third proportional to 17.31 and 31 is: 55.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.31 : 31 = 31 : x
  2. Step 2: Convert to fraction form
    17.31/31 = 31/x
  3. Step 3: Cross multiply
    17.31x = 31 × 31
  4. Step 4: Simplify right side
    17.31x = 961
  5. Step 5: Solve for x
    x = 961/17.31
  6. Step 6: Final answer
    x = 55.51

Related Problems

Find third proportional to 8.66 and 15.50
Half scale
Find third proportional to 34.63 and 62
Double scale
Find third proportional to 19 and 35
Similar ratio
Find third proportional to 25.97 and 46.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.