Home / 20,489.04-28,281.96-12,105

Finding the Fourth Proportional to 20,489.04, 28,281.96 and 12,105

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Solution

The fourth proportional to 20,489.04, 28,281.96 and 12,105 is: 16,709.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.04 : 28,281.96 = 12,105 : x
  2. Step 2: Convert to fraction form
    20,489.04/28,281.96 = 12,105/x
  3. Step 3: Cross multiply
    20,489.04x = 28,281.96 × 12,105
  4. Step 4: Simplify right side
    20,489.04x = 342,353,125.80
  5. Step 5: Solve for x
    x = 342,353,125.80/20,489.04
  6. Step 6: Final answer
    x = 16,709.09

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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.