Home / 3,902-8,418

Finding the Third Proportional to 3,902 and 8,418

Calculator

Solution

The third proportional to 3,902 and 8,418 is: 18,160.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902 : 8,418 = 8,418 : x
  2. Step 2: Convert to fraction form
    3,902/8,418 = 8,418/x
  3. Step 3: Cross multiply
    3,902x = 8,418 × 8,418
  4. Step 4: Simplify right side
    3,902x = 70,862,724
  5. Step 5: Solve for x
    x = 70,862,724/3,902
  6. Step 6: Final answer
    x = 18,160.62

Related Problems

Find third proportional to 1,951 and 4,209
Half scale
Find third proportional to 7,804 and 16,836
Double scale
Find third proportional to 3,904 and 8,422
Similar ratio
Find third proportional to 5,853 and 12,627
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.