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Finding the Fourth Proportional to 13,169, 19,751.07 and 3,806.69

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Solution

The fourth proportional to 13,169, 19,751.07 and 3,806.69 is: 5,709.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169 : 19,751.07 = 3,806.69 : x
  2. Step 2: Convert to fraction form
    13,169/19,751.07 = 3,806.69/x
  3. Step 3: Cross multiply
    13,169x = 19,751.07 × 3,806.69
  4. Step 4: Simplify right side
    13,169x = 75,186,200.66
  5. Step 5: Solve for x
    x = 75,186,200.66/13,169
  6. Step 6: Final answer
    x = 5,709.33

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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.