Home / 18,911.35-28,358.65-7,216.39

Finding the Fourth Proportional to 18,911.35, 28,358.65 and 7,216.39

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Solution

The fourth proportional to 18,911.35, 28,358.65 and 7,216.39 is: 10,821.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.35 : 28,358.65 = 7,216.39 : x
  2. Step 2: Convert to fraction form
    18,911.35/28,358.65 = 7,216.39/x
  3. Step 3: Cross multiply
    18,911.35x = 28,358.65 × 7,216.39
  4. Step 4: Simplify right side
    18,911.35x = 204,647,078.27
  5. Step 5: Solve for x
    x = 204,647,078.27/18,911.35
  6. Step 6: Final answer
    x = 10,821.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.