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Finding the Fourth Proportional to 28,778.73, 39,714.04 and 16,031.89

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Solution

The fourth proportional to 28,778.73, 39,714.04 and 16,031.89 is: 22,123.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.73 : 39,714.04 = 16,031.89 : x
  2. Step 2: Convert to fraction form
    28,778.73/39,714.04 = 16,031.89/x
  3. Step 3: Cross multiply
    28,778.73x = 39,714.04 × 16,031.89
  4. Step 4: Simplify right side
    28,778.73x = 636,691,120.74
  5. Step 5: Solve for x
    x = 636,691,120.74/28,778.73
  6. Step 6: Final answer
    x = 22,123.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.