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Finding the Fourth Proportional to 12,692.88, 17,514.60 and 7,388.64

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Solution

The fourth proportional to 12,692.88, 17,514.60 and 7,388.64 is: 10,195.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.88 : 17,514.60 = 7,388.64 : x
  2. Step 2: Convert to fraction form
    12,692.88/17,514.60 = 7,388.64/x
  3. Step 3: Cross multiply
    12,692.88x = 17,514.60 × 7,388.64
  4. Step 4: Simplify right side
    12,692.88x = 129,409,074.14
  5. Step 5: Solve for x
    x = 129,409,074.14/12,692.88
  6. Step 6: Final answer
    x = 10,195.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.