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Finding the Fourth Proportional to 18,759.29, 28,134.74 and 5,609.95

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Solution

The fourth proportional to 18,759.29, 28,134.74 and 5,609.95 is: 8,413.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.29 : 28,134.74 = 5,609.95 : x
  2. Step 2: Convert to fraction form
    18,759.29/28,134.74 = 5,609.95/x
  3. Step 3: Cross multiply
    18,759.29x = 28,134.74 × 5,609.95
  4. Step 4: Simplify right side
    18,759.29x = 157,834,428.35
  5. Step 5: Solve for x
    x = 157,834,428.35/18,759.29
  6. Step 6: Final answer
    x = 8,413.67

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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.