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Finding the Fourth Proportional to 18,833.60, 28,253.64 and 7,746.32

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Solution

The fourth proportional to 18,833.60, 28,253.64 and 7,746.32 is: 11,620.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.60 : 28,253.64 = 7,746.32 : x
  2. Step 2: Convert to fraction form
    18,833.60/28,253.64 = 7,746.32/x
  3. Step 3: Cross multiply
    18,833.60x = 28,253.64 × 7,746.32
  4. Step 4: Simplify right side
    18,833.60x = 218,861,736.60
  5. Step 5: Solve for x
    x = 218,861,736.60/18,833.60
  6. Step 6: Final answer
    x = 11,620.81

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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.