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Finding the Fourth Proportional to 9,998.40, 14,979.60 and 4,792.80

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Solution

The fourth proportional to 9,998.40, 14,979.60 and 4,792.80 is: 7,180.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,998.40 : 14,979.60 = 4,792.80 : x
  2. Step 2: Convert to fraction form
    9,998.40/14,979.60 = 4,792.80/x
  3. Step 3: Cross multiply
    9,998.40x = 14,979.60 × 4,792.80
  4. Step 4: Simplify right side
    9,998.40x = 71,794,226.88
  5. Step 5: Solve for x
    x = 71,794,226.88/9,998.40
  6. Step 6: Final answer
    x = 7,180.57

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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.