Home / 3,980-8,416

Finding the Third Proportional to 3,980 and 8,416

Calculator

Solution

The third proportional to 3,980 and 8,416 is: 17,796.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980 : 8,416 = 8,416 : x
  2. Step 2: Convert to fraction form
    3,980/8,416 = 8,416/x
  3. Step 3: Cross multiply
    3,980x = 8,416 × 8,416
  4. Step 4: Simplify right side
    3,980x = 70,829,056
  5. Step 5: Solve for x
    x = 70,829,056/3,980
  6. Step 6: Final answer
    x = 17,796.25

Related Problems

Find third proportional to 1,990 and 4,208
Half scale
Find third proportional to 7,960 and 16,832
Double scale
Find third proportional to 3,982 and 8,420
Similar ratio
Find third proportional to 5,970 and 12,624
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.