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Finding the Fourth Proportional to 7,149, 10,729.26 and 3,687.24

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Solution

The fourth proportional to 7,149, 10,729.26 and 3,687.24 is: 5,533.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149 : 10,729.26 = 3,687.24 : x
  2. Step 2: Convert to fraction form
    7,149/10,729.26 = 3,687.24/x
  3. Step 3: Cross multiply
    7,149x = 10,729.26 × 3,687.24
  4. Step 4: Simplify right side
    7,149x = 39,561,356.64
  5. Step 5: Solve for x
    x = 39,561,356.64/7,149
  6. Step 6: Final answer
    x = 5,533.83

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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.