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Finding the Fourth Proportional to 12,305.76, 18,458.79 and 3,540.75

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Solution

The fourth proportional to 12,305.76, 18,458.79 and 3,540.75 is: 5,311.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.76 : 18,458.79 = 3,540.75 : x
  2. Step 2: Convert to fraction form
    12,305.76/18,458.79 = 3,540.75/x
  3. Step 3: Cross multiply
    12,305.76x = 18,458.79 × 3,540.75
  4. Step 4: Simplify right side
    12,305.76x = 65,357,960.69
  5. Step 5: Solve for x
    x = 65,357,960.69/12,305.76
  6. Step 6: Final answer
    x = 5,311.17

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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.