Home / 25-42.75

Finding the Third Proportional to 25 and 42.75

Calculator

Solution

The third proportional to 25 and 42.75 is: 73.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25 : 42.75 = 42.75 : x
  2. Step 2: Convert to fraction form
    25/42.75 = 42.75/x
  3. Step 3: Cross multiply
    25x = 42.75 × 42.75
  4. Step 4: Simplify right side
    25x = 1,827.56
  5. Step 5: Solve for x
    x = 1,827.56/25
  6. Step 6: Final answer
    x = 73.10

Related Problems

Find third proportional to 12.50 and 21.38
Half scale
Find third proportional to 50 and 85.50
Double scale
Find third proportional to 27 and 46
Similar ratio
Find third proportional to 37.50 and 64.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.