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Finding the Fourth Proportional to 11,319.71, 16,979.54 and 4,299.71

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Solution

The fourth proportional to 11,319.71, 16,979.54 and 4,299.71 is: 6,449.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,319.71 : 16,979.54 = 4,299.71 : x
  2. Step 2: Convert to fraction form
    11,319.71/16,979.54 = 4,299.71/x
  3. Step 3: Cross multiply
    11,319.71x = 16,979.54 × 4,299.71
  4. Step 4: Simplify right side
    11,319.71x = 73,007,013.04
  5. Step 5: Solve for x
    x = 73,007,013.04/11,319.71
  6. Step 6: Final answer
    x = 6,449.55

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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.