Home / 4,210-8,900

Finding the Third Proportional to 4,210 and 8,900

Calculator

Solution

The third proportional to 4,210 and 8,900 is: 18,814.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,210 : 8,900 = 8,900 : x
  2. Step 2: Convert to fraction form
    4,210/8,900 = 8,900/x
  3. Step 3: Cross multiply
    4,210x = 8,900 × 8,900
  4. Step 4: Simplify right side
    4,210x = 79,210,000
  5. Step 5: Solve for x
    x = 79,210,000/4,210
  6. Step 6: Final answer
    x = 18,814.73

Related Problems

Find third proportional to 2,105 and 4,450
Half scale
Find third proportional to 8,420 and 17,800
Double scale
Find third proportional to 4,212 and 8,904
Similar ratio
Find third proportional to 6,315 and 13,350
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.