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Finding the Fourth Proportional to 8,630.64, 12,936.24 and 3,699.36

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Solution

The fourth proportional to 8,630.64, 12,936.24 and 3,699.36 is: 5,544.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.64 : 12,936.24 = 3,699.36 : x
  2. Step 2: Convert to fraction form
    8,630.64/12,936.24 = 3,699.36/x
  3. Step 3: Cross multiply
    8,630.64x = 12,936.24 × 3,699.36
  4. Step 4: Simplify right side
    8,630.64x = 47,855,808.81
  5. Step 5: Solve for x
    x = 47,855,808.81/8,630.64
  6. Step 6: Final answer
    x = 5,544.87

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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.