Home / 7,128.48-10,692.87-2,198.55

Finding the Fourth Proportional to 7,128.48, 10,692.87 and 2,198.55

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Solution

The fourth proportional to 7,128.48, 10,692.87 and 2,198.55 is: 3,297.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.48 : 10,692.87 = 2,198.55 : x
  2. Step 2: Convert to fraction form
    7,128.48/10,692.87 = 2,198.55/x
  3. Step 3: Cross multiply
    7,128.48x = 10,692.87 × 2,198.55
  4. Step 4: Simplify right side
    7,128.48x = 23,508,809.34
  5. Step 5: Solve for x
    x = 23,508,809.34/7,128.48
  6. Step 6: Final answer
    x = 3,297.87

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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.