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Finding the Fourth Proportional to 9,129, 13,694.89 and 2,886.94

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Solution

The fourth proportional to 9,129, 13,694.89 and 2,886.94 is: 4,330.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129 : 13,694.89 = 2,886.94 : x
  2. Step 2: Convert to fraction form
    9,129/13,694.89 = 2,886.94/x
  3. Step 3: Cross multiply
    9,129x = 13,694.89 × 2,886.94
  4. Step 4: Simplify right side
    9,129x = 39,536,277.06
  5. Step 5: Solve for x
    x = 39,536,277.06/9,129
  6. Step 6: Final answer
    x = 4,330.84

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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.