Home / 2,820-4,690

Finding the Third Proportional to 2,820 and 4,690

Calculator

Solution

The third proportional to 2,820 and 4,690 is: 7,800.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820 : 4,690 = 4,690 : x
  2. Step 2: Convert to fraction form
    2,820/4,690 = 4,690/x
  3. Step 3: Cross multiply
    2,820x = 4,690 × 4,690
  4. Step 4: Simplify right side
    2,820x = 21,996,100
  5. Step 5: Solve for x
    x = 21,996,100/2,820
  6. Step 6: Final answer
    x = 7,800.04

Related Problems

Find third proportional to 1,410 and 2,345
Half scale
Find third proportional to 5,640 and 9,380
Double scale
Find third proportional to 2,822 and 4,693
Similar ratio
Find third proportional to 4,230 and 7,035
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.