Home / 8,709-12,888

Finding the Third Proportional to 8,709 and 12,888

Calculator

Solution

The third proportional to 8,709 and 12,888 is: 19,072.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709 : 12,888 = 12,888 : x
  2. Step 2: Convert to fraction form
    8,709/12,888 = 12,888/x
  3. Step 3: Cross multiply
    8,709x = 12,888 × 12,888
  4. Step 4: Simplify right side
    8,709x = 166,100,544
  5. Step 5: Solve for x
    x = 166,100,544/8,709
  6. Step 6: Final answer
    x = 19,072.29

Related Problems

Find third proportional to 4,354.50 and 6,444
Half scale
Find third proportional to 17,418 and 25,776
Double scale
Find third proportional to 8,711 and 12,891
Similar ratio
Find third proportional to 13,063.50 and 19,332
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.