Home / 39,690.97-54,774.24-21,787.64

Finding the Fourth Proportional to 39,690.97, 54,774.24 and 21,787.64

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Solution

The fourth proportional to 39,690.97, 54,774.24 and 21,787.64 is: 30,067.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.97 : 54,774.24 = 21,787.64 : x
  2. Step 2: Convert to fraction form
    39,690.97/54,774.24 = 21,787.64/x
  3. Step 3: Cross multiply
    39,690.97x = 54,774.24 × 21,787.64
  4. Step 4: Simplify right side
    39,690.97x = 1,193,401,422.39
  5. Step 5: Solve for x
    x = 1,193,401,422.39/39,690.97
  6. Step 6: Final answer
    x = 30,067.33

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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.