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Finding the Fourth Proportional to 13,758.57, 18,986.40 and 8,093.16

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Solution

The fourth proportional to 13,758.57, 18,986.40 and 8,093.16 is: 11,168.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.57 : 18,986.40 = 8,093.16 : x
  2. Step 2: Convert to fraction form
    13,758.57/18,986.40 = 8,093.16/x
  3. Step 3: Cross multiply
    13,758.57x = 18,986.40 × 8,093.16
  4. Step 4: Simplify right side
    13,758.57x = 153,659,973.02
  5. Step 5: Solve for x
    x = 153,659,973.02/13,758.57
  6. Step 6: Final answer
    x = 11,168.31

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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.