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Finding the Fourth Proportional to 12,185.56, 18,278.28 and 2,951.56

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Solution

The fourth proportional to 12,185.56, 18,278.28 and 2,951.56 is: 4,427.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.56 : 18,278.28 = 2,951.56 : x
  2. Step 2: Convert to fraction form
    12,185.56/18,278.28 = 2,951.56/x
  3. Step 3: Cross multiply
    12,185.56x = 18,278.28 × 2,951.56
  4. Step 4: Simplify right side
    12,185.56x = 53,949,440.12
  5. Step 5: Solve for x
    x = 53,949,440.12/12,185.56
  6. Step 6: Final answer
    x = 4,427.33

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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.