Home / 8,940-11,990

Finding the Third Proportional to 8,940 and 11,990

Calculator

Solution

The third proportional to 8,940 and 11,990 is: 16,080.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940 : 11,990 = 11,990 : x
  2. Step 2: Convert to fraction form
    8,940/11,990 = 11,990/x
  3. Step 3: Cross multiply
    8,940x = 11,990 × 11,990
  4. Step 4: Simplify right side
    8,940x = 143,760,100
  5. Step 5: Solve for x
    x = 143,760,100/8,940
  6. Step 6: Final answer
    x = 16,080.55

Related Problems

Find third proportional to 4,470 and 5,995
Half scale
Find third proportional to 17,880 and 23,980
Double scale
Find third proportional to 8,942 and 11,993
Similar ratio
Find third proportional to 13,410 and 17,985
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.