Home / 39,825.15-54,958.28-21,919.78

Finding the Fourth Proportional to 39,825.15, 54,958.28 and 21,919.78

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Solution

The fourth proportional to 39,825.15, 54,958.28 and 21,919.78 is: 30,249.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,825.15 : 54,958.28 = 21,919.78 : x
  2. Step 2: Convert to fraction form
    39,825.15/54,958.28 = 21,919.78/x
  3. Step 3: Cross multiply
    39,825.15x = 54,958.28 × 21,919.78
  4. Step 4: Simplify right side
    39,825.15x = 1,204,673,097.84
  5. Step 5: Solve for x
    x = 1,204,673,097.84/39,825.15
  6. Step 6: Final answer
    x = 30,249.05

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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.