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Finding the Fourth Proportional to 8,656.56, 12,989.84 and 3,658.56

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Solution

The fourth proportional to 8,656.56, 12,989.84 and 3,658.56 is: 5,489.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.56 : 12,989.84 = 3,658.56 : x
  2. Step 2: Convert to fraction form
    8,656.56/12,989.84 = 3,658.56/x
  3. Step 3: Cross multiply
    8,656.56x = 12,989.84 × 3,658.56
  4. Step 4: Simplify right side
    8,656.56x = 47,524,109.03
  5. Step 5: Solve for x
    x = 47,524,109.03/8,656.56
  6. Step 6: Final answer
    x = 5,489.95

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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.