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Finding the Fourth Proportional to 8,978.39, 13,453.95 and 4,291.94

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Solution

The fourth proportional to 8,978.39, 13,453.95 and 4,291.94 is: 6,431.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.39 : 13,453.95 = 4,291.94 : x
  2. Step 2: Convert to fraction form
    8,978.39/13,453.95 = 4,291.94/x
  3. Step 3: Cross multiply
    8,978.39x = 13,453.95 × 4,291.94
  4. Step 4: Simplify right side
    8,978.39x = 57,743,546.16
  5. Step 5: Solve for x
    x = 57,743,546.16/8,978.39
  6. Step 6: Final answer
    x = 6,431.39

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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.