Home / 31,540.85-47,310.25-12,815.35

Finding the Fourth Proportional to 31,540.85, 47,310.25 and 12,815.35

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Solution

The fourth proportional to 31,540.85, 47,310.25 and 12,815.35 is: 19,222.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,540.85 : 47,310.25 = 12,815.35 : x
  2. Step 2: Convert to fraction form
    31,540.85/47,310.25 = 12,815.35/x
  3. Step 3: Cross multiply
    31,540.85x = 47,310.25 × 12,815.35
  4. Step 4: Simplify right side
    31,540.85x = 606,297,412.34
  5. Step 5: Solve for x
    x = 606,297,412.34/31,540.85
  6. Step 6: Final answer
    x = 19,222.61

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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.