Home / 12,640-19,428

Finding the Third Proportional to 12,640 and 19,428

Calculator

Solution

The third proportional to 12,640 and 19,428 is: 29,861.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640 : 19,428 = 19,428 : x
  2. Step 2: Convert to fraction form
    12,640/19,428 = 19,428/x
  3. Step 3: Cross multiply
    12,640x = 19,428 × 19,428
  4. Step 4: Simplify right side
    12,640x = 377,447,184
  5. Step 5: Solve for x
    x = 377,447,184/12,640
  6. Step 6: Final answer
    x = 29,861.33

Related Problems

Find third proportional to 6,320 and 9,714
Half scale
Find third proportional to 25,280 and 38,856
Double scale
Find third proportional to 12,642 and 19,431
Similar ratio
Find third proportional to 18,960 and 29,142
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.