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Finding the Fourth Proportional to 8,679.83, 11,978.12 and 4,700.96

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Solution

The fourth proportional to 8,679.83, 11,978.12 and 4,700.96 is: 6,487.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.83 : 11,978.12 = 4,700.96 : x
  2. Step 2: Convert to fraction form
    8,679.83/11,978.12 = 4,700.96/x
  3. Step 3: Cross multiply
    8,679.83x = 11,978.12 × 4,700.96
  4. Step 4: Simplify right side
    8,679.83x = 56,308,579.60
  5. Step 5: Solve for x
    x = 56,308,579.60/8,679.83
  6. Step 6: Final answer
    x = 6,487.29

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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.