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Finding the Fourth Proportional to 8,605.50, 12,900.60 and 3,058.11

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Solution

The fourth proportional to 8,605.50, 12,900.60 and 3,058.11 is: 4,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.50 : 12,900.60 = 3,058.11 : x
  2. Step 2: Convert to fraction form
    8,605.50/12,900.60 = 3,058.11/x
  3. Step 3: Cross multiply
    8,605.50x = 12,900.60 × 3,058.11
  4. Step 4: Simplify right side
    8,605.50x = 39,451,453.87
  5. Step 5: Solve for x
    x = 39,451,453.87/8,605.50
  6. Step 6: Final answer
    x = 4,584.45

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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.