Home / 3,390-7,950

Finding the Third Proportional to 3,390 and 7,950

Calculator

Solution

The third proportional to 3,390 and 7,950 is: 18,643.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390 : 7,950 = 7,950 : x
  2. Step 2: Convert to fraction form
    3,390/7,950 = 7,950/x
  3. Step 3: Cross multiply
    3,390x = 7,950 × 7,950
  4. Step 4: Simplify right side
    3,390x = 63,202,500
  5. Step 5: Solve for x
    x = 63,202,500/3,390
  6. Step 6: Final answer
    x = 18,643.81

Related Problems

Find third proportional to 1,695 and 3,975
Half scale
Find third proportional to 6,780 and 15,900
Double scale
Find third proportional to 3,392 and 7,955
Similar ratio
Find third proportional to 5,085 and 11,925
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.