Home / 8,780-18,790

Finding the Third Proportional to 8,780 and 18,790

Calculator

Solution

The third proportional to 8,780 and 18,790 is: 40,212.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780 : 18,790 = 18,790 : x
  2. Step 2: Convert to fraction form
    8,780/18,790 = 18,790/x
  3. Step 3: Cross multiply
    8,780x = 18,790 × 18,790
  4. Step 4: Simplify right side
    8,780x = 353,064,100
  5. Step 5: Solve for x
    x = 353,064,100/8,780
  6. Step 6: Final answer
    x = 40,212.31

Related Problems

Find third proportional to 4,390 and 9,395
Half scale
Find third proportional to 17,560 and 37,580
Double scale
Find third proportional to 8,782 and 18,794
Similar ratio
Find third proportional to 13,170 and 28,185
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.