Home / 5,139-7,938

Finding the Third Proportional to 5,139 and 7,938

Calculator

Solution

The third proportional to 5,139 and 7,938 is: 12,261.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139 : 7,938 = 7,938 : x
  2. Step 2: Convert to fraction form
    5,139/7,938 = 7,938/x
  3. Step 3: Cross multiply
    5,139x = 7,938 × 7,938
  4. Step 4: Simplify right side
    5,139x = 63,011,844
  5. Step 5: Solve for x
    x = 63,011,844/5,139
  6. Step 6: Final answer
    x = 12,261.50

Related Problems

Find third proportional to 2,569.50 and 3,969
Half scale
Find third proportional to 10,278 and 15,876
Double scale
Find third proportional to 5,141 and 7,941
Similar ratio
Find third proportional to 7,708.50 and 11,907
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.