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Finding the Fourth Proportional to 8,986.65, 13,485.97 and 3,143.26

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Solution

The fourth proportional to 8,986.65, 13,485.97 and 3,143.26 is: 4,716.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.65 : 13,485.97 = 3,143.26 : x
  2. Step 2: Convert to fraction form
    8,986.65/13,485.97 = 3,143.26/x
  3. Step 3: Cross multiply
    8,986.65x = 13,485.97 × 3,143.26
  4. Step 4: Simplify right side
    8,986.65x = 42,389,846.15
  5. Step 5: Solve for x
    x = 42,389,846.15/8,986.65
  6. Step 6: Final answer
    x = 4,716.98

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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.