Home / 18,419-39,781

Finding the Third Proportional to 18,419 and 39,781

Calculator

Solution

The third proportional to 18,419 and 39,781 is: 85,918.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419 : 39,781 = 39,781 : x
  2. Step 2: Convert to fraction form
    18,419/39,781 = 39,781/x
  3. Step 3: Cross multiply
    18,419x = 39,781 × 39,781
  4. Step 4: Simplify right side
    18,419x = 1,582,527,961
  5. Step 5: Solve for x
    x = 1,582,527,961/18,419
  6. Step 6: Final answer
    x = 85,918.23

Related Problems

Find third proportional to 9,209.50 and 19,890.50
Half scale
Find third proportional to 36,838 and 79,562
Double scale
Find third proportional to 18,421 and 39,785
Similar ratio
Find third proportional to 27,628.50 and 59,671.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.