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Finding the Fourth Proportional to 5,318.78, 8,017.99 and 4,961.98

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Solution

The fourth proportional to 5,318.78, 8,017.99 and 4,961.98 is: 7,480.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.78 : 8,017.99 = 4,961.98 : x
  2. Step 2: Convert to fraction form
    5,318.78/8,017.99 = 4,961.98/x
  3. Step 3: Cross multiply
    5,318.78x = 8,017.99 × 4,961.98
  4. Step 4: Simplify right side
    5,318.78x = 39,785,065.93
  5. Step 5: Solve for x
    x = 39,785,065.93/5,318.78
  6. Step 6: Final answer
    x = 7,480.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.