Home / 11,218.43-15,481.74-6,438.78

Finding the Fourth Proportional to 11,218.43, 15,481.74 and 6,438.78

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Solution

The fourth proportional to 11,218.43, 15,481.74 and 6,438.78 is: 8,885.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,218.43 : 15,481.74 = 6,438.78 : x
  2. Step 2: Convert to fraction form
    11,218.43/15,481.74 = 6,438.78/x
  3. Step 3: Cross multiply
    11,218.43x = 15,481.74 × 6,438.78
  4. Step 4: Simplify right side
    11,218.43x = 99,683,517.88
  5. Step 5: Solve for x
    x = 99,683,517.88/11,218.43
  6. Step 6: Final answer
    x = 8,885.70

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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.