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Finding the Fourth Proportional to 12,624.54, 18,936.84 and 3,390.54

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Solution

The fourth proportional to 12,624.54, 18,936.84 and 3,390.54 is: 5,085.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,624.54 : 18,936.84 = 3,390.54 : x
  2. Step 2: Convert to fraction form
    12,624.54/18,936.84 = 3,390.54/x
  3. Step 3: Cross multiply
    12,624.54x = 18,936.84 × 3,390.54
  4. Step 4: Simplify right side
    12,624.54x = 64,206,113.49
  5. Step 5: Solve for x
    x = 64,206,113.49/12,624.54
  6. Step 6: Final answer
    x = 5,085.82

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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.