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Finding the Fourth Proportional to 18,934.77, 28,370.77 and 11,516.79

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Solution

The fourth proportional to 18,934.77, 28,370.77 and 11,516.79 is: 17,256.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.77 : 28,370.77 = 11,516.79 : x
  2. Step 2: Convert to fraction form
    18,934.77/28,370.77 = 11,516.79/x
  3. Step 3: Cross multiply
    18,934.77x = 28,370.77 × 11,516.79
  4. Step 4: Simplify right side
    18,934.77x = 326,740,171.44
  5. Step 5: Solve for x
    x = 326,740,171.44/18,934.77
  6. Step 6: Final answer
    x = 17,256.09

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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.