Home / 1,890-4,009

Finding the Third Proportional to 1,890 and 4,009

Calculator

Solution

The third proportional to 1,890 and 4,009 is: 8,503.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890 : 4,009 = 4,009 : x
  2. Step 2: Convert to fraction form
    1,890/4,009 = 4,009/x
  3. Step 3: Cross multiply
    1,890x = 4,009 × 4,009
  4. Step 4: Simplify right side
    1,890x = 16,072,081
  5. Step 5: Solve for x
    x = 16,072,081/1,890
  6. Step 6: Final answer
    x = 8,503.75

Related Problems

Find third proportional to 945 and 2,004.50
Half scale
Find third proportional to 3,780 and 8,018
Double scale
Find third proportional to 1,892 and 4,013
Similar ratio
Find third proportional to 2,835 and 6,013.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.