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Finding the Fourth Proportional to 18,671.96, 28,007.94 and 10,786.48

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Solution

The fourth proportional to 18,671.96, 28,007.94 and 10,786.48 is: 16,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.96 : 28,007.94 = 10,786.48 : x
  2. Step 2: Convert to fraction form
    18,671.96/28,007.94 = 10,786.48/x
  3. Step 3: Cross multiply
    18,671.96x = 28,007.94 × 10,786.48
  4. Step 4: Simplify right side
    18,671.96x = 302,107,084.65
  5. Step 5: Solve for x
    x = 302,107,084.65/18,671.96
  6. Step 6: Final answer
    x = 16,179.72

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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.