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Finding the Fourth Proportional to 13,179.73, 18,188.09 and 7,211.50

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Solution

The fourth proportional to 13,179.73, 18,188.09 and 7,211.50 is: 9,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.73 : 18,188.09 = 7,211.50 : x
  2. Step 2: Convert to fraction form
    13,179.73/18,188.09 = 7,211.50/x
  3. Step 3: Cross multiply
    13,179.73x = 18,188.09 × 7,211.50
  4. Step 4: Simplify right side
    13,179.73x = 131,163,411.04
  5. Step 5: Solve for x
    x = 131,163,411.04/13,179.73
  6. Step 6: Final answer
    x = 9,951.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.