Home / 9,981-21,015

Finding the Third Proportional to 9,981 and 21,015

Calculator

Solution

The third proportional to 9,981 and 21,015 is: 44,247.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981 : 21,015 = 21,015 : x
  2. Step 2: Convert to fraction form
    9,981/21,015 = 21,015/x
  3. Step 3: Cross multiply
    9,981x = 21,015 × 21,015
  4. Step 4: Simplify right side
    9,981x = 441,630,225
  5. Step 5: Solve for x
    x = 441,630,225/9,981
  6. Step 6: Final answer
    x = 44,247.09

Related Problems

Find third proportional to 4,990.50 and 10,507.50
Half scale
Find third proportional to 19,962 and 42,030
Double scale
Find third proportional to 9,983 and 21,019
Similar ratio
Find third proportional to 14,971.50 and 31,522.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.