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Finding the Fourth Proportional to 34,671.78, 51,976.08 and 12,479.94

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Solution

The fourth proportional to 34,671.78, 51,976.08 and 12,479.94 is: 18,708.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,671.78 : 51,976.08 = 12,479.94 : x
  2. Step 2: Convert to fraction form
    34,671.78/51,976.08 = 12,479.94/x
  3. Step 3: Cross multiply
    34,671.78x = 51,976.08 × 12,479.94
  4. Step 4: Simplify right side
    34,671.78x = 648,658,359.84
  5. Step 5: Solve for x
    x = 648,658,359.84/34,671.78
  6. Step 6: Final answer
    x = 18,708.54

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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.