Home / 2,790-7,155

Finding the Third Proportional to 2,790 and 7,155

Calculator

Solution

The third proportional to 2,790 and 7,155 is: 18,349.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790 : 7,155 = 7,155 : x
  2. Step 2: Convert to fraction form
    2,790/7,155 = 7,155/x
  3. Step 3: Cross multiply
    2,790x = 7,155 × 7,155
  4. Step 4: Simplify right side
    2,790x = 51,194,025
  5. Step 5: Solve for x
    x = 51,194,025/2,790
  6. Step 6: Final answer
    x = 18,349.11

Related Problems

Find third proportional to 1,395 and 3,577.50
Half scale
Find third proportional to 5,580 and 14,310
Double scale
Find third proportional to 2,792 and 7,160
Similar ratio
Find third proportional to 4,185 and 10,732.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.