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Finding the Fourth Proportional to 11,876.54, 17,815.21 and 4,479.21

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Solution

The fourth proportional to 11,876.54, 17,815.21 and 4,479.21 is: 6,718.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,876.54 : 17,815.21 = 4,479.21 : x
  2. Step 2: Convert to fraction form
    11,876.54/17,815.21 = 4,479.21/x
  3. Step 3: Cross multiply
    11,876.54x = 17,815.21 × 4,479.21
  4. Step 4: Simplify right side
    11,876.54x = 79,798,055.59
  5. Step 5: Solve for x
    x = 79,798,055.59/11,876.54
  6. Step 6: Final answer
    x = 6,718.97

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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.