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Finding the Fourth Proportional to 18,979.92, 26,201.88 and 13,014

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Solution

The fourth proportional to 18,979.92, 26,201.88 and 13,014 is: 17,965.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.92 : 26,201.88 = 13,014 : x
  2. Step 2: Convert to fraction form
    18,979.92/26,201.88 = 13,014/x
  3. Step 3: Cross multiply
    18,979.92x = 26,201.88 × 13,014
  4. Step 4: Simplify right side
    18,979.92x = 340,991,266.32
  5. Step 5: Solve for x
    x = 340,991,266.32/18,979.92
  6. Step 6: Final answer
    x = 17,965.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.