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Finding the Fourth Proportional to 8,890.68, 12,268.99 and 4,911.69

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Solution

The fourth proportional to 8,890.68, 12,268.99 and 4,911.69 is: 6,778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,890.68 : 12,268.99 = 4,911.69 : x
  2. Step 2: Convert to fraction form
    8,890.68/12,268.99 = 4,911.69/x
  3. Step 3: Cross multiply
    8,890.68x = 12,268.99 × 4,911.69
  4. Step 4: Simplify right side
    8,890.68x = 60,261,475.49
  5. Step 5: Solve for x
    x = 60,261,475.49/8,890.68
  6. Step 6: Final answer
    x = 6,778.05

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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.