Home / 39,690.94-54,774.12-21,787.60

Finding the Fourth Proportional to 39,690.94, 54,774.12 and 21,787.60

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Solution

The fourth proportional to 39,690.94, 54,774.12 and 21,787.60 is: 30,067.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.94 : 54,774.12 = 21,787.60 : x
  2. Step 2: Convert to fraction form
    39,690.94/54,774.12 = 21,787.60/x
  3. Step 3: Cross multiply
    39,690.94x = 54,774.12 × 21,787.60
  4. Step 4: Simplify right side
    39,690.94x = 1,193,396,616.91
  5. Step 5: Solve for x
    x = 1,193,396,616.91/39,690.94
  6. Step 6: Final answer
    x = 30,067.23

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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.