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Finding the Fourth Proportional to 11,295.51, 16,940.86 and 7,129.95

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Solution

The fourth proportional to 11,295.51, 16,940.86 and 7,129.95 is: 10,693.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,295.51 : 16,940.86 = 7,129.95 : x
  2. Step 2: Convert to fraction form
    11,295.51/16,940.86 = 7,129.95/x
  3. Step 3: Cross multiply
    11,295.51x = 16,940.86 × 7,129.95
  4. Step 4: Simplify right side
    11,295.51x = 120,787,466.93
  5. Step 5: Solve for x
    x = 120,787,466.93/11,295.51
  6. Step 6: Final answer
    x = 10,693.41

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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.