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Finding the Fourth Proportional to 8,679.39, 11,977.51 and 4,903.78

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Solution

The fourth proportional to 8,679.39, 11,977.51 and 4,903.78 is: 6,767.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.39 : 11,977.51 = 4,903.78 : x
  2. Step 2: Convert to fraction form
    8,679.39/11,977.51 = 4,903.78/x
  3. Step 3: Cross multiply
    8,679.39x = 11,977.51 × 4,903.78
  4. Step 4: Simplify right side
    8,679.39x = 58,735,039.70
  5. Step 5: Solve for x
    x = 58,735,039.70/8,679.39
  6. Step 6: Final answer
    x = 6,767.18

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.