Home / 18,638-28,138

Finding the Third Proportional to 18,638 and 28,138

Calculator

Solution

The third proportional to 18,638 and 28,138 is: 42,480.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638 : 28,138 = 28,138 : x
  2. Step 2: Convert to fraction form
    18,638/28,138 = 28,138/x
  3. Step 3: Cross multiply
    18,638x = 28,138 × 28,138
  4. Step 4: Simplify right side
    18,638x = 791,747,044
  5. Step 5: Solve for x
    x = 791,747,044/18,638
  6. Step 6: Final answer
    x = 42,480.26

Related Problems

Find third proportional to 9,319 and 14,069
Half scale
Find third proportional to 37,276 and 56,276
Double scale
Find third proportional to 18,640 and 28,141
Similar ratio
Find third proportional to 27,957 and 42,207
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.