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Finding the Fourth Proportional to 8,318.72, 12,477.08 and 3,642

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Solution

The fourth proportional to 8,318.72, 12,477.08 and 3,642 is: 5,462.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.72 : 12,477.08 = 3,642 : x
  2. Step 2: Convert to fraction form
    8,318.72/12,477.08 = 3,642/x
  3. Step 3: Cross multiply
    8,318.72x = 12,477.08 × 3,642
  4. Step 4: Simplify right side
    8,318.72x = 45,441,525.36
  5. Step 5: Solve for x
    x = 45,441,525.36/8,318.72
  6. Step 6: Final answer
    x = 5,462.56

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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.