Home / 17.75-30.80

Finding the Third Proportional to 17.75 and 30.80

Calculator

Solution

The third proportional to 17.75 and 30.80 is: 53.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.75 : 30.80 = 30.80 : x
  2. Step 2: Convert to fraction form
    17.75/30.80 = 30.80/x
  3. Step 3: Cross multiply
    17.75x = 30.80 × 30.80
  4. Step 4: Simplify right side
    17.75x = 948.45
  5. Step 5: Solve for x
    x = 948.45/17.75
  6. Step 6: Final answer
    x = 53.42

Related Problems

Find third proportional to 8.88 and 15.40
Half scale
Find third proportional to 35.51 and 61.59
Double scale
Find third proportional to 20 and 34
Similar ratio
Find third proportional to 26.63 and 46.20
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.73) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.