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Finding the Fourth Proportional to 19,257.88, 28,891.68 and 5,406.88

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Solution

The fourth proportional to 19,257.88, 28,891.68 and 5,406.88 is: 8,111.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,257.88 : 28,891.68 = 5,406.88 : x
  2. Step 2: Convert to fraction form
    19,257.88/28,891.68 = 5,406.88/x
  3. Step 3: Cross multiply
    19,257.88x = 28,891.68 × 5,406.88
  4. Step 4: Simplify right side
    19,257.88x = 156,213,846.76
  5. Step 5: Solve for x
    x = 156,213,846.76/19,257.88
  6. Step 6: Final answer
    x = 8,111.68

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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.