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Finding the Fourth Proportional to 19,099.75, 28,656.93 and 7,413.88

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Solution

The fourth proportional to 19,099.75, 28,656.93 and 7,413.88 is: 11,123.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,099.75 : 28,656.93 = 7,413.88 : x
  2. Step 2: Convert to fraction form
    19,099.75/28,656.93 = 7,413.88/x
  3. Step 3: Cross multiply
    19,099.75x = 28,656.93 × 7,413.88
  4. Step 4: Simplify right side
    19,099.75x = 212,459,040.19
  5. Step 5: Solve for x
    x = 212,459,040.19/19,099.75
  6. Step 6: Final answer
    x = 11,123.66

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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.