Home / 4,908-7,878

Finding the Third Proportional to 4,908 and 7,878

Calculator

Solution

The third proportional to 4,908 and 7,878 is: 12,645.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,908 : 7,878 = 7,878 : x
  2. Step 2: Convert to fraction form
    4,908/7,878 = 7,878/x
  3. Step 3: Cross multiply
    4,908x = 7,878 × 7,878
  4. Step 4: Simplify right side
    4,908x = 62,062,884
  5. Step 5: Solve for x
    x = 62,062,884/4,908
  6. Step 6: Final answer
    x = 12,645.25

Related Problems

Find third proportional to 2,454 and 3,939
Half scale
Find third proportional to 9,816 and 15,756
Double scale
Find third proportional to 4,910 and 7,881
Similar ratio
Find third proportional to 7,362 and 11,817
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.