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Finding the Fourth Proportional to 8,679.73, 11,978.06 and 4,700.84

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Solution

The fourth proportional to 8,679.73, 11,978.06 and 4,700.84 is: 6,487.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.73 : 11,978.06 = 4,700.84 : x
  2. Step 2: Convert to fraction form
    8,679.73/11,978.06 = 4,700.84/x
  3. Step 3: Cross multiply
    8,679.73x = 11,978.06 × 4,700.84
  4. Step 4: Simplify right side
    8,679.73x = 56,306,943.57
  5. Step 5: Solve for x
    x = 56,306,943.57/8,679.73
  6. Step 6: Final answer
    x = 6,487.18

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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.