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Finding the Fourth Proportional to 13,896.68, 19,178.44 and 7,928.48

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Solution

The fourth proportional to 13,896.68, 19,178.44 and 7,928.48 is: 10,941.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,896.68 : 19,178.44 = 7,928.48 : x
  2. Step 2: Convert to fraction form
    13,896.68/19,178.44 = 7,928.48/x
  3. Step 3: Cross multiply
    13,896.68x = 19,178.44 × 7,928.48
  4. Step 4: Simplify right side
    13,896.68x = 152,055,877.97
  5. Step 5: Solve for x
    x = 152,055,877.97/13,896.68
  6. Step 6: Final answer
    x = 10,941.89

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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.