Home / 3,988-8,660

Finding the Third Proportional to 3,988 and 8,660

Calculator

Solution

The third proportional to 3,988 and 8,660 is: 18,805.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988 : 8,660 = 8,660 : x
  2. Step 2: Convert to fraction form
    3,988/8,660 = 8,660/x
  3. Step 3: Cross multiply
    3,988x = 8,660 × 8,660
  4. Step 4: Simplify right side
    3,988x = 74,995,600
  5. Step 5: Solve for x
    x = 74,995,600/3,988
  6. Step 6: Final answer
    x = 18,805.32

Related Problems

Find third proportional to 1,994 and 4,330
Half scale
Find third proportional to 7,976 and 17,320
Double scale
Find third proportional to 3,990 and 8,664
Similar ratio
Find third proportional to 5,982 and 12,990
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.