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Finding the Fourth Proportional to 13,179.52, 18,187.71 and 7,211.17

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Solution

The fourth proportional to 13,179.52, 18,187.71 and 7,211.17 is: 9,951.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.52 : 18,187.71 = 7,211.17 : x
  2. Step 2: Convert to fraction form
    13,179.52/18,187.71 = 7,211.17/x
  3. Step 3: Cross multiply
    13,179.52x = 18,187.71 × 7,211.17
  4. Step 4: Simplify right side
    13,179.52x = 131,154,668.72
  5. Step 5: Solve for x
    x = 131,154,668.72/13,179.52
  6. Step 6: Final answer
    x = 9,951.40

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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.