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Finding the Fourth Proportional to 12,506.70, 18,750.69 and 4,181.88

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Solution

The fourth proportional to 12,506.70, 18,750.69 and 4,181.88 is: 6,269.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,506.70 : 18,750.69 = 4,181.88 : x
  2. Step 2: Convert to fraction form
    12,506.70/18,750.69 = 4,181.88/x
  3. Step 3: Cross multiply
    12,506.70x = 18,750.69 × 4,181.88
  4. Step 4: Simplify right side
    12,506.70x = 78,413,135.50
  5. Step 5: Solve for x
    x = 78,413,135.50/12,506.70
  6. Step 6: Final answer
    x = 6,269.69

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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.