Home / 1,791-3,960

Finding the Third Proportional to 1,791 and 3,960

Calculator

Solution

The third proportional to 1,791 and 3,960 is: 8,755.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791 : 3,960 = 3,960 : x
  2. Step 2: Convert to fraction form
    1,791/3,960 = 3,960/x
  3. Step 3: Cross multiply
    1,791x = 3,960 × 3,960
  4. Step 4: Simplify right side
    1,791x = 15,681,600
  5. Step 5: Solve for x
    x = 15,681,600/1,791
  6. Step 6: Final answer
    x = 8,755.78

Related Problems

Find third proportional to 895.50 and 1,980
Half scale
Find third proportional to 3,582 and 7,920
Double scale
Find third proportional to 1,793 and 3,964
Similar ratio
Find third proportional to 2,686.50 and 5,940
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.