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Finding the Fourth Proportional to 31,919.67, 47,900.16 and 14,388.44

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Solution

The fourth proportional to 31,919.67, 47,900.16 and 14,388.44 is: 21,591.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,919.67 : 47,900.16 = 14,388.44 : x
  2. Step 2: Convert to fraction form
    31,919.67/47,900.16 = 14,388.44/x
  3. Step 3: Cross multiply
    31,919.67x = 47,900.16 × 14,388.44
  4. Step 4: Simplify right side
    31,919.67x = 689,208,338.65
  5. Step 5: Solve for x
    x = 689,208,338.65/31,919.67
  6. Step 6: Final answer
    x = 21,591.96

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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.