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Finding the Fourth Proportional to 19,318.43, 28,974.22 and 8,785.99

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Solution

The fourth proportional to 19,318.43, 28,974.22 and 8,785.99 is: 13,177.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318.43 : 28,974.22 = 8,785.99 : x
  2. Step 2: Convert to fraction form
    19,318.43/28,974.22 = 8,785.99/x
  3. Step 3: Cross multiply
    19,318.43x = 28,974.22 × 8,785.99
  4. Step 4: Simplify right side
    19,318.43x = 254,567,107.87
  5. Step 5: Solve for x
    x = 254,567,107.87/19,318.43
  6. Step 6: Final answer
    x = 13,177.42

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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.