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Finding the Fourth Proportional to 11,979.92, 17,969.88 and 4,586.64

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Solution

The fourth proportional to 11,979.92, 17,969.88 and 4,586.64 is: 6,879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.92 : 17,969.88 = 4,586.64 : x
  2. Step 2: Convert to fraction form
    11,979.92/17,969.88 = 4,586.64/x
  3. Step 3: Cross multiply
    11,979.92x = 17,969.88 × 4,586.64
  4. Step 4: Simplify right side
    11,979.92x = 82,421,370.40
  5. Step 5: Solve for x
    x = 82,421,370.40/11,979.92
  6. Step 6: Final answer
    x = 6,879.96

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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.