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Finding the Fourth Proportional to 8,438.91, 12,658.36 and 3,757.71

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Solution

The fourth proportional to 8,438.91, 12,658.36 and 3,757.71 is: 5,636.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.91 : 12,658.36 = 3,757.71 : x
  2. Step 2: Convert to fraction form
    8,438.91/12,658.36 = 3,757.71/x
  3. Step 3: Cross multiply
    8,438.91x = 12,658.36 × 3,757.71
  4. Step 4: Simplify right side
    8,438.91x = 47,566,445.96
  5. Step 5: Solve for x
    x = 47,566,445.96/8,438.91
  6. Step 6: Final answer
    x = 5,636.56

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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.