Home / 9,986-21,720

Finding the Third Proportional to 9,986 and 21,720

Calculator

Solution

The third proportional to 9,986 and 21,720 is: 47,241.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986 : 21,720 = 21,720 : x
  2. Step 2: Convert to fraction form
    9,986/21,720 = 21,720/x
  3. Step 3: Cross multiply
    9,986x = 21,720 × 21,720
  4. Step 4: Simplify right side
    9,986x = 471,758,400
  5. Step 5: Solve for x
    x = 471,758,400/9,986
  6. Step 6: Final answer
    x = 47,241.98

Related Problems

Find third proportional to 4,993 and 10,860
Half scale
Find third proportional to 19,972 and 43,440
Double scale
Find third proportional to 9,988 and 21,724
Similar ratio
Find third proportional to 14,979 and 32,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.