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Finding the Fourth Proportional to 28,765.76, 39,693.91 and 16,826.76

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Solution

The fourth proportional to 28,765.76, 39,693.91 and 16,826.76 is: 23,219.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.76 : 39,693.91 = 16,826.76 : x
  2. Step 2: Convert to fraction form
    28,765.76/39,693.91 = 16,826.76/x
  3. Step 3: Cross multiply
    28,765.76x = 39,693.91 × 16,826.76
  4. Step 4: Simplify right side
    28,765.76x = 667,919,897.03
  5. Step 5: Solve for x
    x = 667,919,897.03/28,765.76
  6. Step 6: Final answer
    x = 23,219.27

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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.