Home / 20,988-28,800

Finding the Third Proportional to 20,988 and 28,800

Calculator

Solution

The third proportional to 20,988 and 28,800 is: 39,519.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988 : 28,800 = 28,800 : x
  2. Step 2: Convert to fraction form
    20,988/28,800 = 28,800/x
  3. Step 3: Cross multiply
    20,988x = 28,800 × 28,800
  4. Step 4: Simplify right side
    20,988x = 829,440,000
  5. Step 5: Solve for x
    x = 829,440,000/20,988
  6. Step 6: Final answer
    x = 39,519.73

Related Problems

Find third proportional to 10,494 and 14,400
Half scale
Find third proportional to 41,976 and 57,600
Double scale
Find third proportional to 20,990 and 28,803
Similar ratio
Find third proportional to 31,482 and 43,200
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.