Home / 10,919.46-16,379.14-3,128.28

Finding the Fourth Proportional to 10,919.46, 16,379.14 and 3,128.28

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Solution

The fourth proportional to 10,919.46, 16,379.14 and 3,128.28 is: 4,692.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.46 : 16,379.14 = 3,128.28 : x
  2. Step 2: Convert to fraction form
    10,919.46/16,379.14 = 3,128.28/x
  3. Step 3: Cross multiply
    10,919.46x = 16,379.14 × 3,128.28
  4. Step 4: Simplify right side
    10,919.46x = 51,238,536.08
  5. Step 5: Solve for x
    x = 51,238,536.08/10,919.46
  6. Step 6: Final answer
    x = 4,692.41

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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.