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Finding the Fourth Proportional to 39,797.79, 54,922.39 and 21,894.16

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Solution

The fourth proportional to 39,797.79, 54,922.39 and 21,894.16 is: 30,214.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,797.79 : 54,922.39 = 21,894.16 : x
  2. Step 2: Convert to fraction form
    39,797.79/54,922.39 = 21,894.16/x
  3. Step 3: Cross multiply
    39,797.79x = 54,922.39 × 21,894.16
  4. Step 4: Simplify right side
    39,797.79x = 1,202,479,594.24
  5. Step 5: Solve for x
    x = 1,202,479,594.24/39,797.79
  6. Step 6: Final answer
    x = 30,214.73

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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.