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Finding the Fourth Proportional to 19,009, 28,488.36 and 13,761.56

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Solution

The fourth proportional to 19,009, 28,488.36 and 13,761.56 is: 20,624.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009 : 28,488.36 = 13,761.56 : x
  2. Step 2: Convert to fraction form
    19,009/28,488.36 = 13,761.56/x
  3. Step 3: Cross multiply
    19,009x = 28,488.36 × 13,761.56
  4. Step 4: Simplify right side
    19,009x = 392,044,275.44
  5. Step 5: Solve for x
    x = 392,044,275.44/19,009
  6. Step 6: Final answer
    x = 20,624.14

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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.