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Finding the Fourth Proportional to 12,408.75, 17,125.29 and 7,694.55

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Solution

The fourth proportional to 12,408.75, 17,125.29 and 7,694.55 is: 10,619.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.75 : 17,125.29 = 7,694.55 : x
  2. Step 2: Convert to fraction form
    12,408.75/17,125.29 = 7,694.55/x
  3. Step 3: Cross multiply
    12,408.75x = 17,125.29 × 7,694.55
  4. Step 4: Simplify right side
    12,408.75x = 131,771,400.17
  5. Step 5: Solve for x
    x = 131,771,400.17/12,408.75
  6. Step 6: Final answer
    x = 10,619.23

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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.