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Finding the Fourth Proportional to 17,928.64, 26,863.03 and 12,655.00

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Solution

The fourth proportional to 17,928.64, 26,863.03 and 12,655.00 is: 18,961.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,928.64 : 26,863.03 = 12,655.00 : x
  2. Step 2: Convert to fraction form
    17,928.64/26,863.03 = 12,655.00/x
  3. Step 3: Cross multiply
    17,928.64x = 26,863.03 × 12,655.00
  4. Step 4: Simplify right side
    17,928.64x = 339,951,447.06
  5. Step 5: Solve for x
    x = 339,951,447.06/17,928.64
  6. Step 6: Final answer
    x = 18,961.37

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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.