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Finding the Fourth Proportional to 17,928.80, 26,893.20 and 4,781.22

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Solution

The fourth proportional to 17,928.80, 26,893.20 and 4,781.22 is: 7,171.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,928.80 : 26,893.20 = 4,781.22 : x
  2. Step 2: Convert to fraction form
    17,928.80/26,893.20 = 4,781.22/x
  3. Step 3: Cross multiply
    17,928.80x = 26,893.20 × 4,781.22
  4. Step 4: Simplify right side
    17,928.80x = 128,582,305.70
  5. Step 5: Solve for x
    x = 128,582,305.70/17,928.80
  6. Step 6: Final answer
    x = 7,171.83

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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.