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Finding the Fourth Proportional to 19,139.94, 28,765.17 and 17,811.12

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Solution

The fourth proportional to 19,139.94, 28,765.17 and 17,811.12 is: 26,768.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.94 : 28,765.17 = 17,811.12 : x
  2. Step 2: Convert to fraction form
    19,139.94/28,765.17 = 17,811.12/x
  3. Step 3: Cross multiply
    19,139.94x = 28,765.17 × 17,811.12
  4. Step 4: Simplify right side
    19,139.94x = 512,339,894.69
  5. Step 5: Solve for x
    x = 512,339,894.69/19,139.94
  6. Step 6: Final answer
    x = 26,768.10

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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.