Home / 20,939.58-28,898.46-11,509.98

Finding the Fourth Proportional to 20,939.58, 28,898.46 and 11,509.98

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Solution

The fourth proportional to 20,939.58, 28,898.46 and 11,509.98 is: 15,884.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.58 : 28,898.46 = 11,509.98 : x
  2. Step 2: Convert to fraction form
    20,939.58/28,898.46 = 11,509.98/x
  3. Step 3: Cross multiply
    20,939.58x = 28,898.46 × 11,509.98
  4. Step 4: Simplify right side
    20,939.58x = 332,620,696.63
  5. Step 5: Solve for x
    x = 332,620,696.63/20,939.58
  6. Step 6: Final answer
    x = 15,884.78

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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.