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Finding the Fourth Proportional to 12,346.75, 18,520.17 and 4,138.75

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Solution

The fourth proportional to 12,346.75, 18,520.17 and 4,138.75 is: 6,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,346.75 : 18,520.17 = 4,138.75 : x
  2. Step 2: Convert to fraction form
    12,346.75/18,520.17 = 4,138.75/x
  3. Step 3: Cross multiply
    12,346.75x = 18,520.17 × 4,138.75
  4. Step 4: Simplify right side
    12,346.75x = 76,650,353.59
  5. Step 5: Solve for x
    x = 76,650,353.59/12,346.75
  6. Step 6: Final answer
    x = 6,208.14

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1.5x scale

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.