Home / 21,291-43,189

Finding the Third Proportional to 21,291 and 43,189

Calculator

Solution

The third proportional to 21,291 and 43,189 is: 87,609.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291 : 43,189 = 43,189 : x
  2. Step 2: Convert to fraction form
    21,291/43,189 = 43,189/x
  3. Step 3: Cross multiply
    21,291x = 43,189 × 43,189
  4. Step 4: Simplify right side
    21,291x = 1,865,289,721
  5. Step 5: Solve for x
    x = 1,865,289,721/21,291
  6. Step 6: Final answer
    x = 87,609.31

Related Problems

Find third proportional to 10,645.50 and 21,594.50
Half scale
Find third proportional to 42,582 and 86,378
Double scale
Find third proportional to 21,293 and 43,193
Similar ratio
Find third proportional to 31,936.50 and 64,783.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.