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Finding the Fourth Proportional to 30,289.79, 41,797.80 and 18,958.79

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Solution

The fourth proportional to 30,289.79, 41,797.80 and 18,958.79 is: 26,161.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,289.79 : 41,797.80 = 18,958.79 : x
  2. Step 2: Convert to fraction form
    30,289.79/41,797.80 = 18,958.79/x
  3. Step 3: Cross multiply
    30,289.79x = 41,797.80 × 18,958.79
  4. Step 4: Simplify right side
    30,289.79x = 792,435,503.67
  5. Step 5: Solve for x
    x = 792,435,503.67/30,289.79
  6. Step 6: Final answer
    x = 26,161.81

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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.