Home / 9,912-21,381

Finding the Third Proportional to 9,912 and 21,381

Calculator

Solution

The third proportional to 9,912 and 21,381 is: 46,120.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,912 : 21,381 = 21,381 : x
  2. Step 2: Convert to fraction form
    9,912/21,381 = 21,381/x
  3. Step 3: Cross multiply
    9,912x = 21,381 × 21,381
  4. Step 4: Simplify right side
    9,912x = 457,147,161
  5. Step 5: Solve for x
    x = 457,147,161/9,912
  6. Step 6: Final answer
    x = 46,120.58

Related Problems

Find third proportional to 4,956 and 10,690.50
Half scale
Find third proportional to 19,824 and 42,762
Double scale
Find third proportional to 9,914 and 21,385
Similar ratio
Find third proportional to 14,868 and 32,071.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.