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Finding the Fourth Proportional to 30,391.60, 41,942.19 and 16,963.42

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Solution

The fourth proportional to 30,391.60, 41,942.19 and 16,963.42 is: 23,410.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,391.60 : 41,942.19 = 16,963.42 : x
  2. Step 2: Convert to fraction form
    30,391.60/41,942.19 = 16,963.42/x
  3. Step 3: Cross multiply
    30,391.60x = 41,942.19 × 16,963.42
  4. Step 4: Simplify right side
    30,391.60x = 711,482,984.69
  5. Step 5: Solve for x
    x = 711,482,984.69/30,391.60
  6. Step 6: Final answer
    x = 23,410.51

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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.