Home / 9,000-18,120

Finding the Third Proportional to 9,000 and 18,120

Calculator

Solution

The third proportional to 9,000 and 18,120 is: 36,481.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000 : 18,120 = 18,120 : x
  2. Step 2: Convert to fraction form
    9,000/18,120 = 18,120/x
  3. Step 3: Cross multiply
    9,000x = 18,120 × 18,120
  4. Step 4: Simplify right side
    9,000x = 328,334,400
  5. Step 5: Solve for x
    x = 328,334,400/9,000
  6. Step 6: Final answer
    x = 36,481.60

Related Problems

Find third proportional to 4,500 and 9,060
Half scale
Find third proportional to 18,000 and 36,240
Double scale
Find third proportional to 9,002 and 18,124
Similar ratio
Find third proportional to 13,500 and 27,180
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.01) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.