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Finding the Fourth Proportional to 8,679.66, 13,020.10 and 3,485.54

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Solution

The fourth proportional to 8,679.66, 13,020.10 and 3,485.54 is: 5,228.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.66 : 13,020.10 = 3,485.54 : x
  2. Step 2: Convert to fraction form
    8,679.66/13,020.10 = 3,485.54/x
  3. Step 3: Cross multiply
    8,679.66x = 13,020.10 × 3,485.54
  4. Step 4: Simplify right side
    8,679.66x = 45,382,005.54
  5. Step 5: Solve for x
    x = 45,382,005.54/8,679.66
  6. Step 6: Final answer
    x = 5,228.55

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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.