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Finding the Fourth Proportional to 9,855.85, 14,780.70 and 3,280.50

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Solution

The fourth proportional to 9,855.85, 14,780.70 and 3,280.50 is: 4,919.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,855.85 : 14,780.70 = 3,280.50 : x
  2. Step 2: Convert to fraction form
    9,855.85/14,780.70 = 3,280.50/x
  3. Step 3: Cross multiply
    9,855.85x = 14,780.70 × 3,280.50
  4. Step 4: Simplify right side
    9,855.85x = 48,488,095.58
  5. Step 5: Solve for x
    x = 48,488,095.58/9,855.85
  6. Step 6: Final answer
    x = 4,919.73

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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.