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Finding the Fourth Proportional to 13,179.59, 18,188.06 and 7,211.78

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Solution

The fourth proportional to 13,179.59, 18,188.06 and 7,211.78 is: 9,952.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.59 : 18,188.06 = 7,211.78 : x
  2. Step 2: Convert to fraction form
    13,179.59/18,188.06 = 7,211.78/x
  3. Step 3: Cross multiply
    13,179.59x = 18,188.06 × 7,211.78
  4. Step 4: Simplify right side
    13,179.59x = 131,168,160.35
  5. Step 5: Solve for x
    x = 131,168,160.35/13,179.59
  6. Step 6: Final answer
    x = 9,952.37

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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.