Home / 3,905-9,020

Finding the Third Proportional to 3,905 and 9,020

Calculator

Solution

The third proportional to 3,905 and 9,020 is: 20,834.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905 : 9,020 = 9,020 : x
  2. Step 2: Convert to fraction form
    3,905/9,020 = 9,020/x
  3. Step 3: Cross multiply
    3,905x = 9,020 × 9,020
  4. Step 4: Simplify right side
    3,905x = 81,360,400
  5. Step 5: Solve for x
    x = 81,360,400/3,905
  6. Step 6: Final answer
    x = 20,834.93

Related Problems

Find third proportional to 1,952.50 and 4,510
Half scale
Find third proportional to 7,810 and 18,040
Double scale
Find third proportional to 3,907 and 9,025
Similar ratio
Find third proportional to 5,857.50 and 13,530
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.