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Finding the Fourth Proportional to 8,178, 11,285.64 and 4,452

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Solution

The fourth proportional to 8,178, 11,285.64 and 4,452 is: 6,143.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178 : 11,285.64 = 4,452 : x
  2. Step 2: Convert to fraction form
    8,178/11,285.64 = 4,452/x
  3. Step 3: Cross multiply
    8,178x = 11,285.64 × 4,452
  4. Step 4: Simplify right side
    8,178x = 50,243,669.28
  5. Step 5: Solve for x
    x = 50,243,669.28/8,178
  6. Step 6: Final answer
    x = 6,143.76

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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.