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Finding the Fourth Proportional to 20,483.92, 30,676.64 and 11,692.16

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Solution

The fourth proportional to 20,483.92, 30,676.64 and 11,692.16 is: 17,510.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.92 : 30,676.64 = 11,692.16 : x
  2. Step 2: Convert to fraction form
    20,483.92/30,676.64 = 11,692.16/x
  3. Step 3: Cross multiply
    20,483.92x = 30,676.64 × 11,692.16
  4. Step 4: Simplify right side
    20,483.92x = 358,676,183.14
  5. Step 5: Solve for x
    x = 358,676,183.14/20,483.92
  6. Step 6: Final answer
    x = 17,510.13

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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.