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Finding the Fourth Proportional to 18,461.70, 27,696.60 and 5,979.60

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Solution

The fourth proportional to 18,461.70, 27,696.60 and 5,979.60 is: 8,970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.70 : 27,696.60 = 5,979.60 : x
  2. Step 2: Convert to fraction form
    18,461.70/27,696.60 = 5,979.60/x
  3. Step 3: Cross multiply
    18,461.70x = 27,696.60 × 5,979.60
  4. Step 4: Simplify right side
    18,461.70x = 165,614,589.36
  5. Step 5: Solve for x
    x = 165,614,589.36/18,461.70
  6. Step 6: Final answer
    x = 8,970.71

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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.