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Finding the Fourth Proportional to 15,979.20, 23,997.60 and 11,601.60

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Solution

The fourth proportional to 15,979.20, 23,997.60 and 11,601.60 is: 17,423.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979.20 : 23,997.60 = 11,601.60 : x
  2. Step 2: Convert to fraction form
    15,979.20/23,997.60 = 11,601.60/x
  3. Step 3: Cross multiply
    15,979.20x = 23,997.60 × 11,601.60
  4. Step 4: Simplify right side
    15,979.20x = 278,410,556.16
  5. Step 5: Solve for x
    x = 278,410,556.16/15,979.20
  6. Step 6: Final answer
    x = 17,423.31

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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.