Home / 20,428-28,770

Finding the Third Proportional to 20,428 and 28,770

Calculator

Solution

The third proportional to 20,428 and 28,770 is: 40,518.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428 : 28,770 = 28,770 : x
  2. Step 2: Convert to fraction form
    20,428/28,770 = 28,770/x
  3. Step 3: Cross multiply
    20,428x = 28,770 × 28,770
  4. Step 4: Simplify right side
    20,428x = 827,712,900
  5. Step 5: Solve for x
    x = 827,712,900/20,428
  6. Step 6: Final answer
    x = 40,518.55

Related Problems

Find third proportional to 10,214 and 14,385
Half scale
Find third proportional to 40,856 and 57,540
Double scale
Find third proportional to 20,430 and 28,773
Similar ratio
Find third proportional to 30,642 and 43,155
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.