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Finding the Fourth Proportional to 14,798.22, 20,421.90 and 8,083.77

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Solution

The fourth proportional to 14,798.22, 20,421.90 and 8,083.77 is: 11,155.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,798.22 : 20,421.90 = 8,083.77 : x
  2. Step 2: Convert to fraction form
    14,798.22/20,421.90 = 8,083.77/x
  3. Step 3: Cross multiply
    14,798.22x = 20,421.90 × 8,083.77
  4. Step 4: Simplify right side
    14,798.22x = 165,085,942.56
  5. Step 5: Solve for x
    x = 165,085,942.56/14,798.22
  6. Step 6: Final answer
    x = 11,155.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.