Home / 31,540.73-47,310.06-12,815.21

Finding the Fourth Proportional to 31,540.73, 47,310.06 and 12,815.21

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Solution

The fourth proportional to 31,540.73, 47,310.06 and 12,815.21 is: 19,222.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,540.73 : 47,310.06 = 12,815.21 : x
  2. Step 2: Convert to fraction form
    31,540.73/47,310.06 = 12,815.21/x
  3. Step 3: Cross multiply
    31,540.73x = 47,310.06 × 12,815.21
  4. Step 4: Simplify right side
    31,540.73x = 606,288,354.01
  5. Step 5: Solve for x
    x = 606,288,354.01/31,540.73
  6. Step 6: Final answer
    x = 19,222.39

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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.