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Finding the Fourth Proportional to 18,759.07, 25,889.07 and 11,686.54

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Solution

The fourth proportional to 18,759.07, 25,889.07 and 11,686.54 is: 16,128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.07 : 25,889.07 = 11,686.54 : x
  2. Step 2: Convert to fraction form
    18,759.07/25,889.07 = 11,686.54/x
  3. Step 3: Cross multiply
    18,759.07x = 25,889.07 × 11,686.54
  4. Step 4: Simplify right side
    18,759.07x = 302,553,652.12
  5. Step 5: Solve for x
    x = 302,553,652.12/18,759.07
  6. Step 6: Final answer
    x = 16,128.39

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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.