Home / 8,555-18,390

Finding the Third Proportional to 8,555 and 18,390

Calculator

Solution

The third proportional to 8,555 and 18,390 is: 39,531.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555 : 18,390 = 18,390 : x
  2. Step 2: Convert to fraction form
    8,555/18,390 = 18,390/x
  3. Step 3: Cross multiply
    8,555x = 18,390 × 18,390
  4. Step 4: Simplify right side
    8,555x = 338,192,100
  5. Step 5: Solve for x
    x = 338,192,100/8,555
  6. Step 6: Final answer
    x = 39,531.51

Related Problems

Find third proportional to 4,277.50 and 9,195
Half scale
Find third proportional to 17,110 and 36,780
Double scale
Find third proportional to 8,557 and 18,394
Similar ratio
Find third proportional to 12,832.50 and 27,585
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.