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Finding the Fourth Proportional to 5,631.60, 7,764.36 and 3,638.64

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Solution

The fourth proportional to 5,631.60, 7,764.36 and 3,638.64 is: 5,016.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,631.60 : 7,764.36 = 3,638.64 : x
  2. Step 2: Convert to fraction form
    5,631.60/7,764.36 = 3,638.64/x
  3. Step 3: Cross multiply
    5,631.60x = 7,764.36 × 3,638.64
  4. Step 4: Simplify right side
    5,631.60x = 28,251,710.87
  5. Step 5: Solve for x
    x = 28,251,710.87/5,631.60
  6. Step 6: Final answer
    x = 5,016.64

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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.