Home / 5,155-7,831

Finding the Third Proportional to 5,155 and 7,831

Calculator

Solution

The third proportional to 5,155 and 7,831 is: 11,896.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155 : 7,831 = 7,831 : x
  2. Step 2: Convert to fraction form
    5,155/7,831 = 7,831/x
  3. Step 3: Cross multiply
    5,155x = 7,831 × 7,831
  4. Step 4: Simplify right side
    5,155x = 61,324,561
  5. Step 5: Solve for x
    x = 61,324,561/5,155
  6. Step 6: Final answer
    x = 11,896.13

Related Problems

Find third proportional to 2,577.50 and 3,915.50
Half scale
Find third proportional to 10,310 and 15,662
Double scale
Find third proportional to 5,157 and 7,834
Similar ratio
Find third proportional to 7,732.50 and 11,746.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.