Home / 20,829.04-31,213.68-8,979.68

Finding the Fourth Proportional to 20,829.04, 31,213.68 and 8,979.68

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Solution

The fourth proportional to 20,829.04, 31,213.68 and 8,979.68 is: 13,456.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.04 : 31,213.68 = 8,979.68 : x
  2. Step 2: Convert to fraction form
    20,829.04/31,213.68 = 8,979.68/x
  3. Step 3: Cross multiply
    20,829.04x = 31,213.68 × 8,979.68
  4. Step 4: Simplify right side
    20,829.04x = 280,288,858.02
  5. Step 5: Solve for x
    x = 280,288,858.02/20,829.04
  6. Step 6: Final answer
    x = 13,456.64

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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.