Home / 15,408-21,784

Finding the Third Proportional to 15,408 and 21,784

Calculator

Solution

The third proportional to 15,408 and 21,784 is: 30,798.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,408 : 21,784 = 21,784 : x
  2. Step 2: Convert to fraction form
    15,408/21,784 = 21,784/x
  3. Step 3: Cross multiply
    15,408x = 21,784 × 21,784
  4. Step 4: Simplify right side
    15,408x = 474,542,656
  5. Step 5: Solve for x
    x = 474,542,656/15,408
  6. Step 6: Final answer
    x = 30,798.46

Related Problems

Find third proportional to 7,704 and 10,892
Half scale
Find third proportional to 30,816 and 43,568
Double scale
Find third proportional to 15,410 and 21,787
Similar ratio
Find third proportional to 23,112 and 32,676
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.