Home / 20,829.78-31,244.64-6,789.79

Finding the Fourth Proportional to 20,829.78, 31,244.64 and 6,789.79

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Solution

The fourth proportional to 20,829.78, 31,244.64 and 6,789.79 is: 10,184.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.78 : 31,244.64 = 6,789.79 : x
  2. Step 2: Convert to fraction form
    20,829.78/31,244.64 = 6,789.79/x
  3. Step 3: Cross multiply
    20,829.78x = 31,244.64 × 6,789.79
  4. Step 4: Simplify right side
    20,829.78x = 212,144,544.23
  5. Step 5: Solve for x
    x = 212,144,544.23/20,829.78
  6. Step 6: Final answer
    x = 10,184.68

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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.