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Finding the Fourth Proportional to 28,759.88, 43,143.47 and 7,983.38

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Solution

The fourth proportional to 28,759.88, 43,143.47 and 7,983.38 is: 11,976.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,759.88 : 43,143.47 = 7,983.38 : x
  2. Step 2: Convert to fraction form
    28,759.88/43,143.47 = 7,983.38/x
  3. Step 3: Cross multiply
    28,759.88x = 43,143.47 × 7,983.38
  4. Step 4: Simplify right side
    28,759.88x = 344,430,459.89
  5. Step 5: Solve for x
    x = 344,430,459.89/28,759.88
  6. Step 6: Final answer
    x = 11,976.08

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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.