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Finding the Fourth Proportional to 8,710.66, 12,016.74 and 5,171.86

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Solution

The fourth proportional to 8,710.66, 12,016.74 and 5,171.86 is: 7,134.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,710.66 : 12,016.74 = 5,171.86 : x
  2. Step 2: Convert to fraction form
    8,710.66/12,016.74 = 5,171.86/x
  3. Step 3: Cross multiply
    8,710.66x = 12,016.74 × 5,171.86
  4. Step 4: Simplify right side
    8,710.66x = 62,148,896.94
  5. Step 5: Solve for x
    x = 62,148,896.94/8,710.66
  6. Step 6: Final answer
    x = 7,134.81

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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.