Home / 1,687-3,922

Finding the Third Proportional to 1,687 and 3,922

Calculator

Solution

The third proportional to 1,687 and 3,922 is: 9,118.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687 : 3,922 = 3,922 : x
  2. Step 2: Convert to fraction form
    1,687/3,922 = 3,922/x
  3. Step 3: Cross multiply
    1,687x = 3,922 × 3,922
  4. Step 4: Simplify right side
    1,687x = 15,382,084
  5. Step 5: Solve for x
    x = 15,382,084/1,687
  6. Step 6: Final answer
    x = 9,118.01

Related Problems

Find third proportional to 843.50 and 1,961
Half scale
Find third proportional to 3,374 and 7,844
Double scale
Find third proportional to 1,689 and 3,927
Similar ratio
Find third proportional to 2,530.50 and 5,883
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.