Home / 18,928-51,280

Finding the Third Proportional to 18,928 and 51,280

Calculator

Solution

The third proportional to 18,928 and 51,280 is: 138,928.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928 : 51,280 = 51,280 : x
  2. Step 2: Convert to fraction form
    18,928/51,280 = 51,280/x
  3. Step 3: Cross multiply
    18,928x = 51,280 × 51,280
  4. Step 4: Simplify right side
    18,928x = 2,629,638,400
  5. Step 5: Solve for x
    x = 2,629,638,400/18,928
  6. Step 6: Final answer
    x = 138,928.49

Related Problems

Find third proportional to 9,464 and 25,640
Half scale
Find third proportional to 37,856 and 102,560
Double scale
Find third proportional to 18,930 and 51,285
Similar ratio
Find third proportional to 28,392 and 76,920
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.