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Finding the Fourth Proportional to 11,438.50, 15,786.62 and 6,404.64

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Solution

The fourth proportional to 11,438.50, 15,786.62 and 6,404.64 is: 8,839.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,438.50 : 15,786.62 = 6,404.64 : x
  2. Step 2: Convert to fraction form
    11,438.50/15,786.62 = 6,404.64/x
  3. Step 3: Cross multiply
    11,438.50x = 15,786.62 × 6,404.64
  4. Step 4: Simplify right side
    11,438.50x = 101,107,617.92
  5. Step 5: Solve for x
    x = 101,107,617.92/11,438.50
  6. Step 6: Final answer
    x = 8,839.24

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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.