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Finding the Fourth Proportional to 18,834.85, 28,241.33 and 7,141.69

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Solution

The fourth proportional to 18,834.85, 28,241.33 and 7,141.69 is: 10,708.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,834.85 : 28,241.33 = 7,141.69 : x
  2. Step 2: Convert to fraction form
    18,834.85/28,241.33 = 7,141.69/x
  3. Step 3: Cross multiply
    18,834.85x = 28,241.33 × 7,141.69
  4. Step 4: Simplify right side
    18,834.85x = 201,690,824.05
  5. Step 5: Solve for x
    x = 201,690,824.05/18,834.85
  6. Step 6: Final answer
    x = 10,708.38

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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.