Home / 21,316-39,966

Finding the Third Proportional to 21,316 and 39,966

Calculator

Solution

The third proportional to 21,316 and 39,966 is: 74,933.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316 : 39,966 = 39,966 : x
  2. Step 2: Convert to fraction form
    21,316/39,966 = 39,966/x
  3. Step 3: Cross multiply
    21,316x = 39,966 × 39,966
  4. Step 4: Simplify right side
    21,316x = 1,597,281,156
  5. Step 5: Solve for x
    x = 1,597,281,156/21,316
  6. Step 6: Final answer
    x = 74,933.44

Related Problems

Find third proportional to 10,658 and 19,983
Half scale
Find third proportional to 42,632 and 79,932
Double scale
Find third proportional to 21,318 and 39,970
Similar ratio
Find third proportional to 31,974 and 59,949
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.87) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.