Home / 20,804.30-28,709.76-11,372.84

Finding the Fourth Proportional to 20,804.30, 28,709.76 and 11,372.84

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Solution

The fourth proportional to 20,804.30, 28,709.76 and 11,372.84 is: 15,694.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.30 : 28,709.76 = 11,372.84 : x
  2. Step 2: Convert to fraction form
    20,804.30/28,709.76 = 11,372.84/x
  3. Step 3: Cross multiply
    20,804.30x = 28,709.76 × 11,372.84
  4. Step 4: Simplify right side
    20,804.30x = 326,511,506.92
  5. Step 5: Solve for x
    x = 326,511,506.92/20,804.30
  6. Step 6: Final answer
    x = 15,694.42

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1.5x scale

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.