Home / 18,909.35-28,355.66-7,214.39

Finding the Fourth Proportional to 18,909.35, 28,355.66 and 7,214.39

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Solution

The fourth proportional to 18,909.35, 28,355.66 and 7,214.39 is: 10,818.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.35 : 28,355.66 = 7,214.39 : x
  2. Step 2: Convert to fraction form
    18,909.35/28,355.66 = 7,214.39/x
  3. Step 3: Cross multiply
    18,909.35x = 28,355.66 × 7,214.39
  4. Step 4: Simplify right side
    18,909.35x = 204,568,753.88
  5. Step 5: Solve for x
    x = 204,568,753.88/18,909.35
  6. Step 6: Final answer
    x = 10,818.39

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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.