Home / 7,011-9,990

Finding the Third Proportional to 7,011 and 9,990

Calculator

Solution

The third proportional to 7,011 and 9,990 is: 14,234.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,011 : 9,990 = 9,990 : x
  2. Step 2: Convert to fraction form
    7,011/9,990 = 9,990/x
  3. Step 3: Cross multiply
    7,011x = 9,990 × 9,990
  4. Step 4: Simplify right side
    7,011x = 99,800,100
  5. Step 5: Solve for x
    x = 99,800,100/7,011
  6. Step 6: Final answer
    x = 14,234.79

Related Problems

Find third proportional to 3,505.50 and 4,995
Half scale
Find third proportional to 14,022 and 19,980
Double scale
Find third proportional to 7,013 and 9,993
Similar ratio
Find third proportional to 10,516.50 and 14,985
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.