Home / 12,690-16,920

Finding the Third Proportional to 12,690 and 16,920

Calculator

Solution

The third proportional to 12,690 and 16,920 is: 22,560

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690 : 16,920 = 16,920 : x
  2. Step 2: Convert to fraction form
    12,690/16,920 = 16,920/x
  3. Step 3: Cross multiply
    12,690x = 16,920 × 16,920
  4. Step 4: Simplify right side
    12,690x = 286,286,400
  5. Step 5: Solve for x
    x = 286,286,400/12,690
  6. Step 6: Final answer
    x = 22,560

Related Problems

Find third proportional to 6,345 and 8,460
Half scale
Find third proportional to 25,380 and 33,840
Double scale
Find third proportional to 12,692 and 16,923
Similar ratio
Find third proportional to 19,035 and 25,380
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.