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Finding the Fourth Proportional to 8,515.50, 11,751.93 and 4,789.50

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Solution

The fourth proportional to 8,515.50, 11,751.93 and 4,789.50 is: 6,609.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.50 : 11,751.93 = 4,789.50 : x
  2. Step 2: Convert to fraction form
    8,515.50/11,751.93 = 4,789.50/x
  3. Step 3: Cross multiply
    8,515.50x = 11,751.93 × 4,789.50
  4. Step 4: Simplify right side
    8,515.50x = 56,285,868.74
  5. Step 5: Solve for x
    x = 56,285,868.74/8,515.50
  6. Step 6: Final answer
    x = 6,609.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.