Home / 3,218-7,478

Finding the Third Proportional to 3,218 and 7,478

Calculator

Solution

The third proportional to 3,218 and 7,478 is: 17,377.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218 : 7,478 = 7,478 : x
  2. Step 2: Convert to fraction form
    3,218/7,478 = 7,478/x
  3. Step 3: Cross multiply
    3,218x = 7,478 × 7,478
  4. Step 4: Simplify right side
    3,218x = 55,920,484
  5. Step 5: Solve for x
    x = 55,920,484/3,218
  6. Step 6: Final answer
    x = 17,377.40

Related Problems

Find third proportional to 1,609 and 3,739
Half scale
Find third proportional to 6,436 and 14,956
Double scale
Find third proportional to 3,220 and 7,483
Similar ratio
Find third proportional to 4,827 and 11,217
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.