Home / 17.55-40.80

Finding the Third Proportional to 17.55 and 40.80

Calculator

Solution

The third proportional to 17.55 and 40.80 is: 94.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.55 : 40.80 = 40.80 : x
  2. Step 2: Convert to fraction form
    17.55/40.80 = 40.80/x
  3. Step 3: Cross multiply
    17.55x = 40.80 × 40.80
  4. Step 4: Simplify right side
    17.55x = 1,665.02
  5. Step 5: Solve for x
    x = 1,665.02/17.55
  6. Step 6: Final answer
    x = 94.85

Related Problems

Find third proportional to 8.78 and 20.40
Half scale
Find third proportional to 35.11 and 81.61
Double scale
Find third proportional to 20 and 45
Similar ratio
Find third proportional to 26.33 and 61.21
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.