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Finding the Fourth Proportional to 15,098.21, 20,835.57 and 8,383.85

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Solution

The fourth proportional to 15,098.21, 20,835.57 and 8,383.85 is: 11,569.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,098.21 : 20,835.57 = 8,383.85 : x
  2. Step 2: Convert to fraction form
    15,098.21/20,835.57 = 8,383.85/x
  3. Step 3: Cross multiply
    15,098.21x = 20,835.57 × 8,383.85
  4. Step 4: Simplify right side
    15,098.21x = 174,682,189.37
  5. Step 5: Solve for x
    x = 174,682,189.37/15,098.21
  6. Step 6: Final answer
    x = 11,569.73

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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.