Home / 8,891.82-13,318.28-5,421.78

Finding the Fourth Proportional to 8,891.82, 13,318.28 and 5,421.78

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Solution

The fourth proportional to 8,891.82, 13,318.28 and 5,421.78 is: 8,120.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.82 : 13,318.28 = 5,421.78 : x
  2. Step 2: Convert to fraction form
    8,891.82/13,318.28 = 5,421.78/x
  3. Step 3: Cross multiply
    8,891.82x = 13,318.28 × 5,421.78
  4. Step 4: Simplify right side
    8,891.82x = 72,208,784.14
  5. Step 5: Solve for x
    x = 72,208,784.14/8,891.82
  6. Step 6: Final answer
    x = 8,120.81

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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.