Home / 8,889-21,129

Finding the Third Proportional to 8,889 and 21,129

Calculator

Solution

The third proportional to 8,889 and 21,129 is: 50,223.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889 : 21,129 = 21,129 : x
  2. Step 2: Convert to fraction form
    8,889/21,129 = 21,129/x
  3. Step 3: Cross multiply
    8,889x = 21,129 × 21,129
  4. Step 4: Simplify right side
    8,889x = 446,434,641
  5. Step 5: Solve for x
    x = 446,434,641/8,889
  6. Step 6: Final answer
    x = 50,223.27

Related Problems

Find third proportional to 4,444.50 and 10,564.50
Half scale
Find third proportional to 17,778 and 42,258
Double scale
Find third proportional to 8,891 and 21,134
Similar ratio
Find third proportional to 13,333.50 and 31,693.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.