Home / 18.75-36

Finding the Third Proportional to 18.75 and 36

Calculator

Solution

The third proportional to 18.75 and 36 is: 69.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.75 : 36 = 36 : x
  2. Step 2: Convert to fraction form
    18.75/36 = 36/x
  3. Step 3: Cross multiply
    18.75x = 36 × 36
  4. Step 4: Simplify right side
    18.75x = 1,296
  5. Step 5: Solve for x
    x = 1,296/18.75
  6. Step 6: Final answer
    x = 69.12

Related Problems

Find third proportional to 9.38 and 18
Half scale
Find third proportional to 37.50 and 72
Double scale
Find third proportional to 21 and 40
Similar ratio
Find third proportional to 28.13 and 54
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.