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Finding the Fourth Proportional to 18,279.61, 27,429.66 and 9,960.21

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Solution

The fourth proportional to 18,279.61, 27,429.66 and 9,960.21 is: 14,945.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.61 : 27,429.66 = 9,960.21 : x
  2. Step 2: Convert to fraction form
    18,279.61/27,429.66 = 9,960.21/x
  3. Step 3: Cross multiply
    18,279.61x = 27,429.66 × 9,960.21
  4. Step 4: Simplify right side
    18,279.61x = 273,205,173.83
  5. Step 5: Solve for x
    x = 273,205,173.83/18,279.61
  6. Step 6: Final answer
    x = 14,945.90

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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.