Home / 18,919.38-28,385.55-7,235.94

Finding the Fourth Proportional to 18,919.38, 28,385.55 and 7,235.94

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Solution

The fourth proportional to 18,919.38, 28,385.55 and 7,235.94 is: 10,856.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.38 : 28,385.55 = 7,235.94 : x
  2. Step 2: Convert to fraction form
    18,919.38/28,385.55 = 7,235.94/x
  3. Step 3: Cross multiply
    18,919.38x = 28,385.55 × 7,235.94
  4. Step 4: Simplify right side
    18,919.38x = 205,396,136.67
  5. Step 5: Solve for x
    x = 205,396,136.67/18,919.38
  6. Step 6: Final answer
    x = 10,856.39

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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.