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Finding the Fourth Proportional to 6,615, 9,128.71 and 3,631.01

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Solution

The fourth proportional to 6,615, 9,128.71 and 3,631.01 is: 5,010.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615 : 9,128.71 = 3,631.01 : x
  2. Step 2: Convert to fraction form
    6,615/9,128.71 = 3,631.01/x
  3. Step 3: Cross multiply
    6,615x = 9,128.71 × 3,631.01
  4. Step 4: Simplify right side
    6,615x = 33,146,396.19
  5. Step 5: Solve for x
    x = 33,146,396.19/6,615
  6. Step 6: Final answer
    x = 5,010.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.