Home / 20,804.19-28,709.24-12,306.75

Finding the Fourth Proportional to 20,804.19, 28,709.24 and 12,306.75

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Solution

The fourth proportional to 20,804.19, 28,709.24 and 12,306.75 is: 16,982.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.19 : 28,709.24 = 12,306.75 : x
  2. Step 2: Convert to fraction form
    20,804.19/28,709.24 = 12,306.75/x
  3. Step 3: Cross multiply
    20,804.19x = 28,709.24 × 12,306.75
  4. Step 4: Simplify right side
    20,804.19x = 353,317,439.37
  5. Step 5: Solve for x
    x = 353,317,439.37/20,804.19
  6. Step 6: Final answer
    x = 16,982.99

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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.