Home / 3,987-7,374

Finding the Third Proportional to 3,987 and 7,374

Calculator

Solution

The third proportional to 3,987 and 7,374 is: 13,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987 : 7,374 = 7,374 : x
  2. Step 2: Convert to fraction form
    3,987/7,374 = 7,374/x
  3. Step 3: Cross multiply
    3,987x = 7,374 × 7,374
  4. Step 4: Simplify right side
    3,987x = 54,375,876
  5. Step 5: Solve for x
    x = 54,375,876/3,987
  6. Step 6: Final answer
    x = 13,638.29

Related Problems

Find third proportional to 1,993.50 and 3,687
Half scale
Find third proportional to 7,974 and 14,748
Double scale
Find third proportional to 3,989 and 7,378
Similar ratio
Find third proportional to 5,980.50 and 11,061
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.