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Finding the Fourth Proportional to 6,616.18, 9,919.41 and 3,155.86

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Solution

The fourth proportional to 6,616.18, 9,919.41 and 3,155.86 is: 4,731.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616.18 : 9,919.41 = 3,155.86 : x
  2. Step 2: Convert to fraction form
    6,616.18/9,919.41 = 3,155.86/x
  3. Step 3: Cross multiply
    6,616.18x = 9,919.41 × 3,155.86
  4. Step 4: Simplify right side
    6,616.18x = 31,304,269.24
  5. Step 5: Solve for x
    x = 31,304,269.24/6,616.18
  6. Step 6: Final answer
    x = 4,731.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.