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Finding the Fourth Proportional to 14,378.93, 19,843.08 and 7,919.30

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Solution

The fourth proportional to 14,378.93, 19,843.08 and 7,919.30 is: 10,928.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,378.93 : 19,843.08 = 7,919.30 : x
  2. Step 2: Convert to fraction form
    14,378.93/19,843.08 = 7,919.30/x
  3. Step 3: Cross multiply
    14,378.93x = 19,843.08 × 7,919.30
  4. Step 4: Simplify right side
    14,378.93x = 157,143,303.44
  5. Step 5: Solve for x
    x = 157,143,303.44/14,378.93
  6. Step 6: Final answer
    x = 10,928.72

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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.