Home / 6,408-8,639

Finding the Third Proportional to 6,408 and 8,639

Calculator

Solution

The third proportional to 6,408 and 8,639 is: 11,646.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,408 : 8,639 = 8,639 : x
  2. Step 2: Convert to fraction form
    6,408/8,639 = 8,639/x
  3. Step 3: Cross multiply
    6,408x = 8,639 × 8,639
  4. Step 4: Simplify right side
    6,408x = 74,632,321
  5. Step 5: Solve for x
    x = 74,632,321/6,408
  6. Step 6: Final answer
    x = 11,646.74

Related Problems

Find third proportional to 3,204 and 4,319.50
Half scale
Find third proportional to 12,816 and 17,278
Double scale
Find third proportional to 6,410 and 8,642
Similar ratio
Find third proportional to 9,612 and 12,958.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.