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Finding the Fourth Proportional to 13,563.20, 20,353.44 and 5,772

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Solution

The fourth proportional to 13,563.20, 20,353.44 and 5,772 is: 8,661.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563.20 : 20,353.44 = 5,772 : x
  2. Step 2: Convert to fraction form
    13,563.20/20,353.44 = 5,772/x
  3. Step 3: Cross multiply
    13,563.20x = 20,353.44 × 5,772
  4. Step 4: Simplify right side
    13,563.20x = 117,480,055.68
  5. Step 5: Solve for x
    x = 117,480,055.68/13,563.20
  6. Step 6: Final answer
    x = 8,661.68

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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.