Home / 19,816-39,128

Finding the Third Proportional to 19,816 and 39,128

Calculator

Solution

The third proportional to 19,816 and 39,128 is: 77,260.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,816 : 39,128 = 39,128 : x
  2. Step 2: Convert to fraction form
    19,816/39,128 = 39,128/x
  3. Step 3: Cross multiply
    19,816x = 39,128 × 39,128
  4. Step 4: Simplify right side
    19,816x = 1,531,000,384
  5. Step 5: Solve for x
    x = 1,531,000,384/19,816
  6. Step 6: Final answer
    x = 77,260.82

Related Problems

Find third proportional to 9,908 and 19,564
Half scale
Find third proportional to 39,632 and 78,256
Double scale
Find third proportional to 19,818 and 39,132
Similar ratio
Find third proportional to 29,724 and 58,692
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.