Home / 3,928-8,315

Finding the Third Proportional to 3,928 and 8,315

Calculator

Solution

The third proportional to 3,928 and 8,315 is: 17,601.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928 : 8,315 = 8,315 : x
  2. Step 2: Convert to fraction form
    3,928/8,315 = 8,315/x
  3. Step 3: Cross multiply
    3,928x = 8,315 × 8,315
  4. Step 4: Simplify right side
    3,928x = 69,139,225
  5. Step 5: Solve for x
    x = 69,139,225/3,928
  6. Step 6: Final answer
    x = 17,601.64

Related Problems

Find third proportional to 1,964 and 4,157.50
Half scale
Find third proportional to 7,856 and 16,630
Double scale
Find third proportional to 3,930 and 8,319
Similar ratio
Find third proportional to 5,892 and 12,472.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.