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Finding the Fourth Proportional to 9,129.42, 13,696.56 and 2,889.56

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Solution

The fourth proportional to 9,129.42, 13,696.56 and 2,889.56 is: 4,335.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.42 : 13,696.56 = 2,889.56 : x
  2. Step 2: Convert to fraction form
    9,129.42/13,696.56 = 2,889.56/x
  3. Step 3: Cross multiply
    9,129.42x = 13,696.56 × 2,889.56
  4. Step 4: Simplify right side
    9,129.42x = 39,576,963.43
  5. Step 5: Solve for x
    x = 39,576,963.43/9,129.42
  6. Step 6: Final answer
    x = 4,335.10

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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.