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Finding the Fourth Proportional to 19,103.76, 28,654.92 and 7,858.68

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Solution

The fourth proportional to 19,103.76, 28,654.92 and 7,858.68 is: 11,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,103.76 : 28,654.92 = 7,858.68 : x
  2. Step 2: Convert to fraction form
    19,103.76/28,654.92 = 7,858.68/x
  3. Step 3: Cross multiply
    19,103.76x = 28,654.92 × 7,858.68
  4. Step 4: Simplify right side
    19,103.76x = 225,189,846.71
  5. Step 5: Solve for x
    x = 225,189,846.71/19,103.76
  6. Step 6: Final answer
    x = 11,787.72

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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.