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Finding the Fourth Proportional to 5,308.17, 7,963.61 and 3,118.74

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Solution

The fourth proportional to 5,308.17, 7,963.61 and 3,118.74 is: 4,678.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308.17 : 7,963.61 = 3,118.74 : x
  2. Step 2: Convert to fraction form
    5,308.17/7,963.61 = 3,118.74/x
  3. Step 3: Cross multiply
    5,308.17x = 7,963.61 × 3,118.74
  4. Step 4: Simplify right side
    5,308.17x = 24,836,413.46
  5. Step 5: Solve for x
    x = 24,836,413.46/5,308.17
  6. Step 6: Final answer
    x = 4,678.90

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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.