Home / 8,220-12,402

Finding the Third Proportional to 8,220 and 12,402

Calculator

Solution

The third proportional to 8,220 and 12,402 is: 18,711.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220 : 12,402 = 12,402 : x
  2. Step 2: Convert to fraction form
    8,220/12,402 = 12,402/x
  3. Step 3: Cross multiply
    8,220x = 12,402 × 12,402
  4. Step 4: Simplify right side
    8,220x = 153,809,604
  5. Step 5: Solve for x
    x = 153,809,604/8,220
  6. Step 6: Final answer
    x = 18,711.63

Related Problems

Find third proportional to 4,110 and 6,201
Half scale
Find third proportional to 16,440 and 24,804
Double scale
Find third proportional to 8,222 and 12,405
Similar ratio
Find third proportional to 12,330 and 18,603
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.