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Finding the Fourth Proportional to 6,615.62, 9,128.98 and 3,631.45

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Solution

The fourth proportional to 6,615.62, 9,128.98 and 3,631.45 is: 5,011.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.62 : 9,128.98 = 3,631.45 : x
  2. Step 2: Convert to fraction form
    6,615.62/9,128.98 = 3,631.45/x
  3. Step 3: Cross multiply
    6,615.62x = 9,128.98 × 3,631.45
  4. Step 4: Simplify right side
    6,615.62x = 33,151,434.42
  5. Step 5: Solve for x
    x = 33,151,434.42/6,615.62
  6. Step 6: Final answer
    x = 5,011.09

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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.