Home / 10,818-16,920

Finding the Third Proportional to 10,818 and 16,920

Calculator

Solution

The third proportional to 10,818 and 16,920 is: 26,463.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,818 : 16,920 = 16,920 : x
  2. Step 2: Convert to fraction form
    10,818/16,920 = 16,920/x
  3. Step 3: Cross multiply
    10,818x = 16,920 × 16,920
  4. Step 4: Simplify right side
    10,818x = 286,286,400
  5. Step 5: Solve for x
    x = 286,286,400/10,818
  6. Step 6: Final answer
    x = 26,463.89

Related Problems

Find third proportional to 5,409 and 8,460
Half scale
Find third proportional to 21,636 and 33,840
Double scale
Find third proportional to 10,820 and 16,923
Similar ratio
Find third proportional to 16,227 and 25,380
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.