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Finding the Fourth Proportional to 27,979.70, 41,969.55 and 13,183.70

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Solution

The fourth proportional to 27,979.70, 41,969.55 and 13,183.70 is: 19,775.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.70 : 41,969.55 = 13,183.70 : x
  2. Step 2: Convert to fraction form
    27,979.70/41,969.55 = 13,183.70/x
  3. Step 3: Cross multiply
    27,979.70x = 41,969.55 × 13,183.70
  4. Step 4: Simplify right side
    27,979.70x = 553,313,956.34
  5. Step 5: Solve for x
    x = 553,313,956.34/27,979.70
  6. Step 6: Final answer
    x = 19,775.55

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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.