Home / 21,200-40,472

Finding the Third Proportional to 21,200 and 40,472

Calculator

Solution

The third proportional to 21,200 and 40,472 is: 77,263.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,200 : 40,472 = 40,472 : x
  2. Step 2: Convert to fraction form
    21,200/40,472 = 40,472/x
  3. Step 3: Cross multiply
    21,200x = 40,472 × 40,472
  4. Step 4: Simplify right side
    21,200x = 1,637,982,784
  5. Step 5: Solve for x
    x = 1,637,982,784/21,200
  6. Step 6: Final answer
    x = 77,263.34

Related Problems

Find third proportional to 10,600 and 20,236
Half scale
Find third proportional to 42,400 and 80,944
Double scale
Find third proportional to 21,202 and 40,476
Similar ratio
Find third proportional to 31,800 and 60,708
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.