Home / 4,390-8,940

Finding the Third Proportional to 4,390 and 8,940

Calculator

Solution

The third proportional to 4,390 and 8,940 is: 18,205.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,390 : 8,940 = 8,940 : x
  2. Step 2: Convert to fraction form
    4,390/8,940 = 8,940/x
  3. Step 3: Cross multiply
    4,390x = 8,940 × 8,940
  4. Step 4: Simplify right side
    4,390x = 79,923,600
  5. Step 5: Solve for x
    x = 79,923,600/4,390
  6. Step 6: Final answer
    x = 18,205.83

Related Problems

Find third proportional to 2,195 and 4,470
Half scale
Find third proportional to 8,780 and 17,880
Double scale
Find third proportional to 4,392 and 8,944
Similar ratio
Find third proportional to 6,585 and 13,410
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.