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Finding the Fourth Proportional to 8,579.60, 12,869.40 and 8,336.60

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Solution

The fourth proportional to 8,579.60, 12,869.40 and 8,336.60 is: 12,504.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.60 : 12,869.40 = 8,336.60 : x
  2. Step 2: Convert to fraction form
    8,579.60/12,869.40 = 8,336.60/x
  3. Step 3: Cross multiply
    8,579.60x = 12,869.40 × 8,336.60
  4. Step 4: Simplify right side
    8,579.60x = 107,287,040.04
  5. Step 5: Solve for x
    x = 107,287,040.04/8,579.60
  6. Step 6: Final answer
    x = 12,504.90

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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.