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Finding the Fourth Proportional to 28,804.35, 43,103.87 and 19,921.48

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Solution

The fourth proportional to 28,804.35, 43,103.87 and 19,921.48 is: 29,811.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,804.35 : 43,103.87 = 19,921.48 : x
  2. Step 2: Convert to fraction form
    28,804.35/43,103.87 = 19,921.48/x
  3. Step 3: Cross multiply
    28,804.35x = 43,103.87 × 19,921.48
  4. Step 4: Simplify right side
    28,804.35x = 858,692,884.13
  5. Step 5: Solve for x
    x = 858,692,884.13/28,804.35
  6. Step 6: Final answer
    x = 29,811.22

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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.