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Finding the Fourth Proportional to 11,885.46, 17,818.47 and 4,485.71

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Solution

The fourth proportional to 11,885.46, 17,818.47 and 4,485.71 is: 6,724.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,885.46 : 17,818.47 = 4,485.71 : x
  2. Step 2: Convert to fraction form
    11,885.46/17,818.47 = 4,485.71/x
  3. Step 3: Cross multiply
    11,885.46x = 17,818.47 × 4,485.71
  4. Step 4: Simplify right side
    11,885.46x = 79,928,399.97
  5. Step 5: Solve for x
    x = 79,928,399.97/11,885.46
  6. Step 6: Final answer
    x = 6,724.89

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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.