Home / 5,400-8,100

Finding the Third Proportional to 5,400 and 8,100

Calculator

Solution

The third proportional to 5,400 and 8,100 is: 12,150

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,400 : 8,100 = 8,100 : x
  2. Step 2: Convert to fraction form
    5,400/8,100 = 8,100/x
  3. Step 3: Cross multiply
    5,400x = 8,100 × 8,100
  4. Step 4: Simplify right side
    5,400x = 65,610,000
  5. Step 5: Solve for x
    x = 65,610,000/5,400
  6. Step 6: Final answer
    x = 12,150

Related Problems

Find third proportional to 2,700 and 4,050
Half scale
Find third proportional to 10,800 and 16,200
Double scale
Find third proportional to 5,402 and 8,103
Similar ratio
Find third proportional to 8,100 and 12,150
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.