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Finding the Fourth Proportional to 10,979.71, 16,469.60 and 2,659.71

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Solution

The fourth proportional to 10,979.71, 16,469.60 and 2,659.71 is: 3,989.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.71 : 16,469.60 = 2,659.71 : x
  2. Step 2: Convert to fraction form
    10,979.71/16,469.60 = 2,659.71/x
  3. Step 3: Cross multiply
    10,979.71x = 16,469.60 × 2,659.71
  4. Step 4: Simplify right side
    10,979.71x = 43,804,359.82
  5. Step 5: Solve for x
    x = 43,804,359.82/10,979.71
  6. Step 6: Final answer
    x = 3,989.57

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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.