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Finding the Fourth Proportional to 8,655.25, 12,977.68 and 3,969.39

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Solution

The fourth proportional to 8,655.25, 12,977.68 and 3,969.39 is: 5,951.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.25 : 12,977.68 = 3,969.39 : x
  2. Step 2: Convert to fraction form
    8,655.25/12,977.68 = 3,969.39/x
  3. Step 3: Cross multiply
    8,655.25x = 12,977.68 × 3,969.39
  4. Step 4: Simplify right side
    8,655.25x = 51,513,403.37
  5. Step 5: Solve for x
    x = 51,513,403.37/8,655.25
  6. Step 6: Final answer
    x = 5,951.70

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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.