Home / 21,351.21-29,464.68-11,919.75

Finding the Fourth Proportional to 21,351.21, 29,464.68 and 11,919.75

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Solution

The fourth proportional to 21,351.21, 29,464.68 and 11,919.75 is: 16,449.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.21 : 29,464.68 = 11,919.75 : x
  2. Step 2: Convert to fraction form
    21,351.21/29,464.68 = 11,919.75/x
  3. Step 3: Cross multiply
    21,351.21x = 29,464.68 × 11,919.75
  4. Step 4: Simplify right side
    21,351.21x = 351,211,619.43
  5. Step 5: Solve for x
    x = 351,211,619.43/21,351.21
  6. Step 6: Final answer
    x = 16,449.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.