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Finding the Fourth Proportional to 13,029.98, 17,976.51 and 8,556.21

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Solution

The fourth proportional to 13,029.98, 17,976.51 and 8,556.21 is: 11,804.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,029.98 : 17,976.51 = 8,556.21 : x
  2. Step 2: Convert to fraction form
    13,029.98/17,976.51 = 8,556.21/x
  3. Step 3: Cross multiply
    13,029.98x = 17,976.51 × 8,556.21
  4. Step 4: Simplify right side
    13,029.98x = 153,810,794.63
  5. Step 5: Solve for x
    x = 153,810,794.63/13,029.98
  6. Step 6: Final answer
    x = 11,804.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.