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Finding the Fourth Proportional to 8,919.36, 12,300.48 and 5,772

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Solution

The fourth proportional to 8,919.36, 12,300.48 and 5,772 is: 7,960.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.36 : 12,300.48 = 5,772 : x
  2. Step 2: Convert to fraction form
    8,919.36/12,300.48 = 5,772/x
  3. Step 3: Cross multiply
    8,919.36x = 12,300.48 × 5,772
  4. Step 4: Simplify right side
    8,919.36x = 70,998,370.56
  5. Step 5: Solve for x
    x = 70,998,370.56/8,919.36
  6. Step 6: Final answer
    x = 7,960.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.