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Finding the Fourth Proportional to 20,603.34, 30,816.81 and 19,109.34

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Solution

The fourth proportional to 20,603.34, 30,816.81 and 19,109.34 is: 28,582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.34 : 30,816.81 = 19,109.34 : x
  2. Step 2: Convert to fraction form
    20,603.34/30,816.81 = 19,109.34/x
  3. Step 3: Cross multiply
    20,603.34x = 30,816.81 × 19,109.34
  4. Step 4: Simplify right side
    20,603.34x = 588,888,900.01
  5. Step 5: Solve for x
    x = 588,888,900.01/20,603.34
  6. Step 6: Final answer
    x = 28,582.21

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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.