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Finding the Fourth Proportional to 12,435, 18,652.50 and 4,227

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Solution

The fourth proportional to 12,435, 18,652.50 and 4,227 is: 6,340.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,435 : 18,652.50 = 4,227 : x
  2. Step 2: Convert to fraction form
    12,435/18,652.50 = 4,227/x
  3. Step 3: Cross multiply
    12,435x = 18,652.50 × 4,227
  4. Step 4: Simplify right side
    12,435x = 78,844,117.50
  5. Step 5: Solve for x
    x = 78,844,117.50/12,435
  6. Step 6: Final answer
    x = 6,340.50

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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.