Home / 18,290-39,478

Finding the Third Proportional to 18,290 and 39,478

Calculator

Solution

The third proportional to 18,290 and 39,478 is: 85,211.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,290 : 39,478 = 39,478 : x
  2. Step 2: Convert to fraction form
    18,290/39,478 = 39,478/x
  3. Step 3: Cross multiply
    18,290x = 39,478 × 39,478
  4. Step 4: Simplify right side
    18,290x = 1,558,512,484
  5. Step 5: Solve for x
    x = 1,558,512,484/18,290
  6. Step 6: Final answer
    x = 85,211.18

Related Problems

Find third proportional to 9,145 and 19,739
Half scale
Find third proportional to 36,580 and 78,956
Double scale
Find third proportional to 18,292 and 39,482
Similar ratio
Find third proportional to 27,435 and 59,217
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.