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Finding the Fourth Proportional to 18,640.50, 27,971.16 and 14,488.83

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Solution

The fourth proportional to 18,640.50, 27,971.16 and 14,488.83 is: 21,741.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.50 : 27,971.16 = 14,488.83 : x
  2. Step 2: Convert to fraction form
    18,640.50/27,971.16 = 14,488.83/x
  3. Step 3: Cross multiply
    18,640.50x = 27,971.16 × 14,488.83
  4. Step 4: Simplify right side
    18,640.50x = 405,269,382.14
  5. Step 5: Solve for x
    x = 405,269,382.14/18,640.50
  6. Step 6: Final answer
    x = 21,741.34

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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.