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Finding the Fourth Proportional to 28,778.73, 43,140.39 and 14,745.39

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Solution

The fourth proportional to 28,778.73, 43,140.39 and 14,745.39 is: 22,103.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.73 : 43,140.39 = 14,745.39 : x
  2. Step 2: Convert to fraction form
    28,778.73/43,140.39 = 14,745.39/x
  3. Step 3: Cross multiply
    28,778.73x = 43,140.39 × 14,745.39
  4. Step 4: Simplify right side
    28,778.73x = 636,121,875.30
  5. Step 5: Solve for x
    x = 636,121,875.30/28,778.73
  6. Step 6: Final answer
    x = 22,103.89

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1.5x scale

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.