Home / 8,720-11,784

Finding the Third Proportional to 8,720 and 11,784

Calculator

Solution

The third proportional to 8,720 and 11,784 is: 15,924.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720 : 11,784 = 11,784 : x
  2. Step 2: Convert to fraction form
    8,720/11,784 = 11,784/x
  3. Step 3: Cross multiply
    8,720x = 11,784 × 11,784
  4. Step 4: Simplify right side
    8,720x = 138,862,656
  5. Step 5: Solve for x
    x = 138,862,656/8,720
  6. Step 6: Final answer
    x = 15,924.62

Related Problems

Find third proportional to 4,360 and 5,892
Half scale
Find third proportional to 17,440 and 23,568
Double scale
Find third proportional to 8,722 and 11,787
Similar ratio
Find third proportional to 13,080 and 17,676
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.