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Finding the Fourth Proportional to 18,886.92, 28,319.86 and 7,801.12

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Solution

The fourth proportional to 18,886.92, 28,319.86 and 7,801.12 is: 11,697.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886.92 : 28,319.86 = 7,801.12 : x
  2. Step 2: Convert to fraction form
    18,886.92/28,319.86 = 7,801.12/x
  3. Step 3: Cross multiply
    18,886.92x = 28,319.86 × 7,801.12
  4. Step 4: Simplify right side
    18,886.92x = 220,926,626.24
  5. Step 5: Solve for x
    x = 220,926,626.24/18,886.92
  6. Step 6: Final answer
    x = 11,697.33

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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.