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Finding the Fourth Proportional to 19,195.65, 28,728.45 and 11,804.79

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Solution

The fourth proportional to 19,195.65, 28,728.45 and 11,804.79 is: 17,667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,195.65 : 28,728.45 = 11,804.79 : x
  2. Step 2: Convert to fraction form
    19,195.65/28,728.45 = 11,804.79/x
  3. Step 3: Cross multiply
    19,195.65x = 28,728.45 × 11,804.79
  4. Step 4: Simplify right side
    19,195.65x = 339,133,319.28
  5. Step 5: Solve for x
    x = 339,133,319.28/19,195.65
  6. Step 6: Final answer
    x = 17,667.20

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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.