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Finding the Fourth Proportional to 12,211.71, 18,304.11 and 7,989.89

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Solution

The fourth proportional to 12,211.71, 18,304.11 and 7,989.89 is: 11,976.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.71 : 18,304.11 = 7,989.89 : x
  2. Step 2: Convert to fraction form
    12,211.71/18,304.11 = 7,989.89/x
  3. Step 3: Cross multiply
    12,211.71x = 18,304.11 × 7,989.89
  4. Step 4: Simplify right side
    12,211.71x = 146,247,871.21
  5. Step 5: Solve for x
    x = 146,247,871.21/12,211.71
  6. Step 6: Final answer
    x = 11,976.04

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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.