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Finding the Fourth Proportional to 30,979.81, 46,469.63 and 8,793.21

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Solution

The fourth proportional to 30,979.81, 46,469.63 and 8,793.21 is: 13,189.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.81 : 46,469.63 = 8,793.21 : x
  2. Step 2: Convert to fraction form
    30,979.81/46,469.63 = 8,793.21/x
  3. Step 3: Cross multiply
    30,979.81x = 46,469.63 × 8,793.21
  4. Step 4: Simplify right side
    30,979.81x = 408,617,100.60
  5. Step 5: Solve for x
    x = 408,617,100.60/30,979.81
  6. Step 6: Final answer
    x = 13,189.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.