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Finding the Fourth Proportional to 13,925.99, 20,890.94 and 4,065.99

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Solution

The fourth proportional to 13,925.99, 20,890.94 and 4,065.99 is: 6,099.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,925.99 : 20,890.94 = 4,065.99 : x
  2. Step 2: Convert to fraction form
    13,925.99/20,890.94 = 4,065.99/x
  3. Step 3: Cross multiply
    13,925.99x = 20,890.94 × 4,065.99
  4. Step 4: Simplify right side
    13,925.99x = 84,942,332.80
  5. Step 5: Solve for x
    x = 84,942,332.80/13,925.99
  6. Step 6: Final answer
    x = 6,099.56

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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.