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Finding the Fourth Proportional to 18,732.78, 25,851.72 and 10,775.76

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Solution

The fourth proportional to 18,732.78, 25,851.72 and 10,775.76 is: 14,870.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.78 : 25,851.72 = 10,775.76 : x
  2. Step 2: Convert to fraction form
    18,732.78/25,851.72 = 10,775.76/x
  3. Step 3: Cross multiply
    18,732.78x = 25,851.72 × 10,775.76
  4. Step 4: Simplify right side
    18,732.78x = 278,571,930.31
  5. Step 5: Solve for x
    x = 278,571,930.31/18,732.78
  6. Step 6: Final answer
    x = 14,870.83

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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.