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Finding the Fourth Proportional to 8,930.80, 13,390.80 and 3,999.52

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Solution

The fourth proportional to 8,930.80, 13,390.80 and 3,999.52 is: 5,996.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,930.80 : 13,390.80 = 3,999.52 : x
  2. Step 2: Convert to fraction form
    8,930.80/13,390.80 = 3,999.52/x
  3. Step 3: Cross multiply
    8,930.80x = 13,390.80 × 3,999.52
  4. Step 4: Simplify right side
    8,930.80x = 53,556,772.42
  5. Step 5: Solve for x
    x = 53,556,772.42/8,930.80
  6. Step 6: Final answer
    x = 5,996.86

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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.