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Finding the Fourth Proportional to 28,529, 39,370.92 and 15,953.72

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Solution

The fourth proportional to 28,529, 39,370.92 and 15,953.72 is: 22,016.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529 : 39,370.92 = 15,953.72 : x
  2. Step 2: Convert to fraction form
    28,529/39,370.92 = 15,953.72/x
  3. Step 3: Cross multiply
    28,529x = 39,370.92 × 15,953.72
  4. Step 4: Simplify right side
    28,529x = 628,112,633.82
  5. Step 5: Solve for x
    x = 628,112,633.82/28,529
  6. Step 6: Final answer
    x = 22,016.64

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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.