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Finding the Fourth Proportional to 28,849.80, 43,201.80 and 18,935.40

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Solution

The fourth proportional to 28,849.80, 43,201.80 and 18,935.40 is: 28,355.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,849.80 : 43,201.80 = 18,935.40 : x
  2. Step 2: Convert to fraction form
    28,849.80/43,201.80 = 18,935.40/x
  3. Step 3: Cross multiply
    28,849.80x = 43,201.80 × 18,935.40
  4. Step 4: Simplify right side
    28,849.80x = 818,043,363.72
  5. Step 5: Solve for x
    x = 818,043,363.72/28,849.80
  6. Step 6: Final answer
    x = 28,355.25

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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.