Home / 8,508-12,840

Finding the Third Proportional to 8,508 and 12,840

Calculator

Solution

The third proportional to 8,508 and 12,840 is: 19,377.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,508 : 12,840 = 12,840 : x
  2. Step 2: Convert to fraction form
    8,508/12,840 = 12,840/x
  3. Step 3: Cross multiply
    8,508x = 12,840 × 12,840
  4. Step 4: Simplify right side
    8,508x = 164,865,600
  5. Step 5: Solve for x
    x = 164,865,600/8,508
  6. Step 6: Final answer
    x = 19,377.72

Related Problems

Find third proportional to 4,254 and 6,420
Half scale
Find third proportional to 17,016 and 25,680
Double scale
Find third proportional to 8,510 and 12,843
Similar ratio
Find third proportional to 12,762 and 19,260
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.