Home / 8,979-12,561

Finding the Third Proportional to 8,979 and 12,561

Calculator

Solution

The third proportional to 8,979 and 12,561 is: 17,571.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979 : 12,561 = 12,561 : x
  2. Step 2: Convert to fraction form
    8,979/12,561 = 12,561/x
  3. Step 3: Cross multiply
    8,979x = 12,561 × 12,561
  4. Step 4: Simplify right side
    8,979x = 157,778,721
  5. Step 5: Solve for x
    x = 157,778,721/8,979
  6. Step 6: Final answer
    x = 17,571.97

Related Problems

Find third proportional to 4,489.50 and 6,280.50
Half scale
Find third proportional to 17,958 and 25,122
Double scale
Find third proportional to 8,981 and 12,564
Similar ratio
Find third proportional to 13,468.50 and 18,841.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.