Home / 18,720-28,156

Finding the Third Proportional to 18,720 and 28,156

Calculator

Solution

The third proportional to 18,720 and 28,156 is: 42,348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720 : 28,156 = 28,156 : x
  2. Step 2: Convert to fraction form
    18,720/28,156 = 28,156/x
  3. Step 3: Cross multiply
    18,720x = 28,156 × 28,156
  4. Step 4: Simplify right side
    18,720x = 792,760,336
  5. Step 5: Solve for x
    x = 792,760,336/18,720
  6. Step 6: Final answer
    x = 42,348.31

Related Problems

Find third proportional to 9,360 and 14,078
Half scale
Find third proportional to 37,440 and 56,312
Double scale
Find third proportional to 18,722 and 28,159
Similar ratio
Find third proportional to 28,080 and 42,234
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.