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Finding the Fourth Proportional to 28,710.81, 43,067.03 and 7,934.31

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Solution

The fourth proportional to 28,710.81, 43,067.03 and 7,934.31 is: 11,901.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,710.81 : 43,067.03 = 7,934.31 : x
  2. Step 2: Convert to fraction form
    28,710.81/43,067.03 = 7,934.31/x
  3. Step 3: Cross multiply
    28,710.81x = 43,067.03 × 7,934.31
  4. Step 4: Simplify right side
    28,710.81x = 341,707,127.13
  5. Step 5: Solve for x
    x = 341,707,127.13/28,710.81
  6. Step 6: Final answer
    x = 11,901.69

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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.