Home / 2,811-6,690

Finding the Third Proportional to 2,811 and 6,690

Calculator

Solution

The third proportional to 2,811 and 6,690 is: 15,921.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811 : 6,690 = 6,690 : x
  2. Step 2: Convert to fraction form
    2,811/6,690 = 6,690/x
  3. Step 3: Cross multiply
    2,811x = 6,690 × 6,690
  4. Step 4: Simplify right side
    2,811x = 44,756,100
  5. Step 5: Solve for x
    x = 44,756,100/2,811
  6. Step 6: Final answer
    x = 15,921.77

Related Problems

Find third proportional to 1,405.50 and 3,345
Half scale
Find third proportional to 5,622 and 13,380
Double scale
Find third proportional to 2,813 and 6,695
Similar ratio
Find third proportional to 4,216.50 and 10,035
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.