Home / 18,412-39,872

Finding the Third Proportional to 18,412 and 39,872

Calculator

Solution

The third proportional to 18,412 and 39,872 is: 86,344.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412 : 39,872 = 39,872 : x
  2. Step 2: Convert to fraction form
    18,412/39,872 = 39,872/x
  3. Step 3: Cross multiply
    18,412x = 39,872 × 39,872
  4. Step 4: Simplify right side
    18,412x = 1,589,776,384
  5. Step 5: Solve for x
    x = 1,589,776,384/18,412
  6. Step 6: Final answer
    x = 86,344.58

Related Problems

Find third proportional to 9,206 and 19,936
Half scale
Find third proportional to 36,824 and 79,744
Double scale
Find third proportional to 18,414 and 39,876
Similar ratio
Find third proportional to 27,618 and 59,808
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.