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Finding the Fourth Proportional to 28,981.80, 43,399.80 and 19,067.40

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Solution

The fourth proportional to 28,981.80, 43,399.80 and 19,067.40 is: 28,553.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,981.80 : 43,399.80 = 19,067.40 : x
  2. Step 2: Convert to fraction form
    28,981.80/43,399.80 = 19,067.40/x
  3. Step 3: Cross multiply
    28,981.80x = 43,399.80 × 19,067.40
  4. Step 4: Simplify right side
    28,981.80x = 827,521,346.52
  5. Step 5: Solve for x
    x = 827,521,346.52/28,981.80
  6. Step 6: Final answer
    x = 28,553.14

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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.