Home / 3,391-6,989

Finding the Third Proportional to 3,391 and 6,989

Calculator

Solution

The third proportional to 3,391 and 6,989 is: 14,404.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391 : 6,989 = 6,989 : x
  2. Step 2: Convert to fraction form
    3,391/6,989 = 6,989/x
  3. Step 3: Cross multiply
    3,391x = 6,989 × 6,989
  4. Step 4: Simplify right side
    3,391x = 48,846,121
  5. Step 5: Solve for x
    x = 48,846,121/3,391
  6. Step 6: Final answer
    x = 14,404.64

Related Problems

Find third proportional to 1,695.50 and 3,494.50
Half scale
Find third proportional to 6,782 and 13,978
Double scale
Find third proportional to 3,393 and 6,993
Similar ratio
Find third proportional to 5,086.50 and 10,483.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.