Home / 4,256-7,990

Finding the Third Proportional to 4,256 and 7,990

Calculator

Solution

The third proportional to 4,256 and 7,990 is: 15,000.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,256 : 7,990 = 7,990 : x
  2. Step 2: Convert to fraction form
    4,256/7,990 = 7,990/x
  3. Step 3: Cross multiply
    4,256x = 7,990 × 7,990
  4. Step 4: Simplify right side
    4,256x = 63,840,100
  5. Step 5: Solve for x
    x = 63,840,100/4,256
  6. Step 6: Final answer
    x = 15,000.02

Related Problems

Find third proportional to 2,128 and 3,995
Half scale
Find third proportional to 8,512 and 15,980
Double scale
Find third proportional to 4,258 and 7,994
Similar ratio
Find third proportional to 6,384 and 11,985
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.