Home / 20,789.87-28,685.76-11,835.02

Finding the Fourth Proportional to 20,789.87, 28,685.76 and 11,835.02

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Solution

The fourth proportional to 20,789.87, 28,685.76 and 11,835.02 is: 16,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.87 : 28,685.76 = 11,835.02 : x
  2. Step 2: Convert to fraction form
    20,789.87/28,685.76 = 11,835.02/x
  3. Step 3: Cross multiply
    20,789.87x = 28,685.76 × 11,835.02
  4. Step 4: Simplify right side
    20,789.87x = 339,496,399.89
  5. Step 5: Solve for x
    x = 339,496,399.89/20,789.87
  6. Step 6: Final answer
    x = 16,329.90

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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.