Home / 27,720-42,408

Finding the Third Proportional to 27,720 and 42,408

Calculator

Solution

The third proportional to 27,720 and 42,408 is: 64,878.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720 : 42,408 = 42,408 : x
  2. Step 2: Convert to fraction form
    27,720/42,408 = 42,408/x
  3. Step 3: Cross multiply
    27,720x = 42,408 × 42,408
  4. Step 4: Simplify right side
    27,720x = 1,798,438,464
  5. Step 5: Solve for x
    x = 1,798,438,464/27,720
  6. Step 6: Final answer
    x = 64,878.73

Related Problems

Find third proportional to 13,860 and 21,204
Half scale
Find third proportional to 55,440 and 84,816
Double scale
Find third proportional to 27,722 and 42,411
Similar ratio
Find third proportional to 41,580 and 63,612
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.