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Finding the Fourth Proportional to 15,829.92, 23,745.44 and 12,138.88

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Solution

The fourth proportional to 15,829.92, 23,745.44 and 12,138.88 is: 18,208.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,829.92 : 23,745.44 = 12,138.88 : x
  2. Step 2: Convert to fraction form
    15,829.92/23,745.44 = 12,138.88/x
  3. Step 3: Cross multiply
    15,829.92x = 23,745.44 × 12,138.88
  4. Step 4: Simplify right side
    15,829.92x = 288,243,046.71
  5. Step 5: Solve for x
    x = 288,243,046.71/15,829.92
  6. Step 6: Final answer
    x = 18,208.75

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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.