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Finding the Fourth Proportional to 8,478.11, 11,699.57 and 4,701.21

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Solution

The fourth proportional to 8,478.11, 11,699.57 and 4,701.21 is: 6,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.11 : 11,699.57 = 4,701.21 : x
  2. Step 2: Convert to fraction form
    8,478.11/11,699.57 = 4,701.21/x
  3. Step 3: Cross multiply
    8,478.11x = 11,699.57 × 4,701.21
  4. Step 4: Simplify right side
    8,478.11x = 55,002,169.17
  5. Step 5: Solve for x
    x = 55,002,169.17/8,478.11
  6. Step 6: Final answer
    x = 6,487.55

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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.