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Finding the Fourth Proportional to 13,708.60, 18,918.04 and 8,043.06

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Solution

The fourth proportional to 13,708.60, 18,918.04 and 8,043.06 is: 11,099.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.60 : 18,918.04 = 8,043.06 : x
  2. Step 2: Convert to fraction form
    13,708.60/18,918.04 = 8,043.06/x
  3. Step 3: Cross multiply
    13,708.60x = 18,918.04 × 8,043.06
  4. Step 4: Simplify right side
    13,708.60x = 152,158,930.80
  5. Step 5: Solve for x
    x = 152,158,930.80/13,708.60
  6. Step 6: Final answer
    x = 11,099.52

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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.