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Finding the Fourth Proportional to 7,481.85, 10,324.90 and 4,078.86

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Solution

The fourth proportional to 7,481.85, 10,324.90 and 4,078.86 is: 5,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,481.85 : 10,324.90 = 4,078.86 : x
  2. Step 2: Convert to fraction form
    7,481.85/10,324.90 = 4,078.86/x
  3. Step 3: Cross multiply
    7,481.85x = 10,324.90 × 4,078.86
  4. Step 4: Simplify right side
    7,481.85x = 42,113,787.99
  5. Step 5: Solve for x
    x = 42,113,787.99/7,481.85
  6. Step 6: Final answer
    x = 5,628.80

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1.5x scale

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.