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Finding the Fourth Proportional to 14,121.66, 19,488.15 and 7,834.38

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Solution

The fourth proportional to 14,121.66, 19,488.15 and 7,834.38 is: 10,811.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.66 : 19,488.15 = 7,834.38 : x
  2. Step 2: Convert to fraction form
    14,121.66/19,488.15 = 7,834.38/x
  3. Step 3: Cross multiply
    14,121.66x = 19,488.15 × 7,834.38
  4. Step 4: Simplify right side
    14,121.66x = 152,677,572.60
  5. Step 5: Solve for x
    x = 152,677,572.60/14,121.66
  6. Step 6: Final answer
    x = 10,811.59

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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.