Home / 3,980-7,862

Finding the Third Proportional to 3,980 and 7,862

Calculator

Solution

The third proportional to 3,980 and 7,862 is: 15,530.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980 : 7,862 = 7,862 : x
  2. Step 2: Convert to fraction form
    3,980/7,862 = 7,862/x
  3. Step 3: Cross multiply
    3,980x = 7,862 × 7,862
  4. Step 4: Simplify right side
    3,980x = 61,811,044
  5. Step 5: Solve for x
    x = 61,811,044/3,980
  6. Step 6: Final answer
    x = 15,530.41

Related Problems

Find third proportional to 1,990 and 3,931
Half scale
Find third proportional to 7,960 and 15,724
Double scale
Find third proportional to 3,982 and 7,866
Similar ratio
Find third proportional to 5,970 and 11,793
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.