Home / 15,942-21,285

Finding the Third Proportional to 15,942 and 21,285

Calculator

Solution

The third proportional to 15,942 and 21,285 is: 28,418.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,942 : 21,285 = 21,285 : x
  2. Step 2: Convert to fraction form
    15,942/21,285 = 21,285/x
  3. Step 3: Cross multiply
    15,942x = 21,285 × 21,285
  4. Step 4: Simplify right side
    15,942x = 453,051,225
  5. Step 5: Solve for x
    x = 453,051,225/15,942
  6. Step 6: Final answer
    x = 28,418.72

Related Problems

Find third proportional to 7,971 and 10,642.50
Half scale
Find third proportional to 31,884 and 42,570
Double scale
Find third proportional to 15,944 and 21,288
Similar ratio
Find third proportional to 23,913 and 31,927.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.