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Finding the Fourth Proportional to 17,199.20, 25,784.40 and 8,991.20

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Solution

The fourth proportional to 17,199.20, 25,784.40 and 8,991.20 is: 13,479.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,199.20 : 25,784.40 = 8,991.20 : x
  2. Step 2: Convert to fraction form
    17,199.20/25,784.40 = 8,991.20/x
  3. Step 3: Cross multiply
    17,199.20x = 25,784.40 × 8,991.20
  4. Step 4: Simplify right side
    17,199.20x = 231,832,697.28
  5. Step 5: Solve for x
    x = 231,832,697.28/17,199.20
  6. Step 6: Final answer
    x = 13,479.27

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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.