Home / 7,200-9,720

Finding the Third Proportional to 7,200 and 9,720

Calculator

Solution

The third proportional to 7,200 and 9,720 is: 13,122

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200 : 9,720 = 9,720 : x
  2. Step 2: Convert to fraction form
    7,200/9,720 = 9,720/x
  3. Step 3: Cross multiply
    7,200x = 9,720 × 9,720
  4. Step 4: Simplify right side
    7,200x = 94,478,400
  5. Step 5: Solve for x
    x = 94,478,400/7,200
  6. Step 6: Final answer
    x = 13,122

Related Problems

Find third proportional to 3,600 and 4,860
Half scale
Find third proportional to 14,400 and 19,440
Double scale
Find third proportional to 7,202 and 9,723
Similar ratio
Find third proportional to 10,800 and 14,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.