Home / 11,400-18,918

Finding the Third Proportional to 11,400 and 18,918

Calculator

Solution

The third proportional to 11,400 and 18,918 is: 31,393.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,400 : 18,918 = 18,918 : x
  2. Step 2: Convert to fraction form
    11,400/18,918 = 18,918/x
  3. Step 3: Cross multiply
    11,400x = 18,918 × 18,918
  4. Step 4: Simplify right side
    11,400x = 357,890,724
  5. Step 5: Solve for x
    x = 357,890,724/11,400
  6. Step 6: Final answer
    x = 31,393.92

Related Problems

Find third proportional to 5,700 and 9,459
Half scale
Find third proportional to 22,800 and 37,836
Double scale
Find third proportional to 11,402 and 18,921
Similar ratio
Find third proportional to 17,100 and 28,377
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.