Home / 11,272-18,780

Finding the Third Proportional to 11,272 and 18,780

Calculator

Solution

The third proportional to 11,272 and 18,780 is: 31,288.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,272 : 18,780 = 18,780 : x
  2. Step 2: Convert to fraction form
    11,272/18,780 = 18,780/x
  3. Step 3: Cross multiply
    11,272x = 18,780 × 18,780
  4. Step 4: Simplify right side
    11,272x = 352,688,400
  5. Step 5: Solve for x
    x = 352,688,400/11,272
  6. Step 6: Final answer
    x = 31,288.89

Related Problems

Find third proportional to 5,636 and 9,390
Half scale
Find third proportional to 22,544 and 37,560
Double scale
Find third proportional to 11,274 and 18,783
Similar ratio
Find third proportional to 16,908 and 28,170
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.