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Finding the Fourth Proportional to 8,445.87, 12,668.81 and 3,181.68

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Solution

The fourth proportional to 8,445.87, 12,668.81 and 3,181.68 is: 4,772.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,445.87 : 12,668.81 = 3,181.68 : x
  2. Step 2: Convert to fraction form
    8,445.87/12,668.81 = 3,181.68/x
  3. Step 3: Cross multiply
    8,445.87x = 12,668.81 × 3,181.68
  4. Step 4: Simplify right side
    8,445.87x = 40,308,083.49
  5. Step 5: Solve for x
    x = 40,308,083.49/8,445.87
  6. Step 6: Final answer
    x = 4,772.52

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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.