Home / 18,815-40,221

Finding the Third Proportional to 18,815 and 40,221

Calculator

Solution

The third proportional to 18,815 and 40,221 is: 85,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815 : 40,221 = 40,221 : x
  2. Step 2: Convert to fraction form
    18,815/40,221 = 40,221/x
  3. Step 3: Cross multiply
    18,815x = 40,221 × 40,221
  4. Step 4: Simplify right side
    18,815x = 1,617,728,841
  5. Step 5: Solve for x
    x = 1,617,728,841/18,815
  6. Step 6: Final answer
    x = 85,980.80

Related Problems

Find third proportional to 9,407.50 and 20,110.50
Half scale
Find third proportional to 37,630 and 80,442
Double scale
Find third proportional to 18,817 and 40,225
Similar ratio
Find third proportional to 28,222.50 and 60,331.50
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.