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Finding the Fourth Proportional to 7,923.80, 11,881.20 and 2,993.60

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Solution

The fourth proportional to 7,923.80, 11,881.20 and 2,993.60 is: 4,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,923.80 : 11,881.20 = 2,993.60 : x
  2. Step 2: Convert to fraction form
    7,923.80/11,881.20 = 2,993.60/x
  3. Step 3: Cross multiply
    7,923.80x = 11,881.20 × 2,993.60
  4. Step 4: Simplify right side
    7,923.80x = 35,567,560.32
  5. Step 5: Solve for x
    x = 35,567,560.32/7,923.80
  6. Step 6: Final answer
    x = 4,488.70

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1.5x scale

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.