Home / 5,211-9,903

Finding the Third Proportional to 5,211 and 9,903

Calculator

Solution

The third proportional to 5,211 and 9,903 is: 18,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211 : 9,903 = 9,903 : x
  2. Step 2: Convert to fraction form
    5,211/9,903 = 9,903/x
  3. Step 3: Cross multiply
    5,211x = 9,903 × 9,903
  4. Step 4: Simplify right side
    5,211x = 98,069,409
  5. Step 5: Solve for x
    x = 98,069,409/5,211
  6. Step 6: Final answer
    x = 18,819.69

Related Problems

Find third proportional to 2,605.50 and 4,951.50
Half scale
Find third proportional to 10,422 and 19,806
Double scale
Find third proportional to 5,213 and 9,907
Similar ratio
Find third proportional to 7,816.50 and 14,854.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.