Home / 7,128.82-10,692.08-2,131.12

Finding the Fourth Proportional to 7,128.82, 10,692.08 and 2,131.12

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Solution

The fourth proportional to 7,128.82, 10,692.08 and 2,131.12 is: 3,196.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.82 : 10,692.08 = 2,131.12 : x
  2. Step 2: Convert to fraction form
    7,128.82/10,692.08 = 2,131.12/x
  3. Step 3: Cross multiply
    7,128.82x = 10,692.08 × 2,131.12
  4. Step 4: Simplify right side
    7,128.82x = 22,786,041.41
  5. Step 5: Solve for x
    x = 22,786,041.41/7,128.82
  6. Step 6: Final answer
    x = 3,196.33

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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.