Home / 10.98-20.74

Finding the Third Proportional to 10.98 and 20.74

Calculator

Solution

The third proportional to 10.98 and 20.74 is: 39.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.98 : 20.74 = 20.74 : x
  2. Step 2: Convert to fraction form
    10.98/20.74 = 20.74/x
  3. Step 3: Cross multiply
    10.98x = 20.74 × 20.74
  4. Step 4: Simplify right side
    10.98x = 430.35
  5. Step 5: Solve for x
    x = 430.35/10.98
  6. Step 6: Final answer
    x = 39.18

Related Problems

Find third proportional to 5.49 and 10.37
Half scale
Find third proportional to 21.97 and 41.49
Double scale
Find third proportional to 13 and 25
Similar ratio
Find third proportional to 16.47 and 31.12
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.