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Finding the Fourth Proportional to 8,620.60, 12,913.80 and 6,763

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Solution

The fourth proportional to 8,620.60, 12,913.80 and 6,763 is: 10,131.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.60 : 12,913.80 = 6,763 : x
  2. Step 2: Convert to fraction form
    8,620.60/12,913.80 = 6,763/x
  3. Step 3: Cross multiply
    8,620.60x = 12,913.80 × 6,763
  4. Step 4: Simplify right side
    8,620.60x = 87,336,029.40
  5. Step 5: Solve for x
    x = 87,336,029.40/8,620.60
  6. Step 6: Final answer
    x = 10,131.08

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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.