Home / 8,811.28-13,218-4,128.88

Finding the Fourth Proportional to 8,811.28, 13,218 and 4,128.88

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Solution

The fourth proportional to 8,811.28, 13,218 and 4,128.88 is: 6,193.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.28 : 13,218 = 4,128.88 : x
  2. Step 2: Convert to fraction form
    8,811.28/13,218 = 4,128.88/x
  3. Step 3: Cross multiply
    8,811.28x = 13,218 × 4,128.88
  4. Step 4: Simplify right side
    8,811.28x = 54,575,535.84
  5. Step 5: Solve for x
    x = 54,575,535.84/8,811.28
  6. Step 6: Final answer
    x = 6,193.83

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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.