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Finding the Fourth Proportional to 8,672.40, 13,008.60 and 4,289.29

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Solution

The fourth proportional to 8,672.40, 13,008.60 and 4,289.29 is: 6,433.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.40 : 13,008.60 = 4,289.29 : x
  2. Step 2: Convert to fraction form
    8,672.40/13,008.60 = 4,289.29/x
  3. Step 3: Cross multiply
    8,672.40x = 13,008.60 × 4,289.29
  4. Step 4: Simplify right side
    8,672.40x = 55,797,625.37
  5. Step 5: Solve for x
    x = 55,797,625.37/8,672.40
  6. Step 6: Final answer
    x = 6,433.93

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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.