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Finding the Fourth Proportional to 18,372.54, 27,558.20 and 7,984.30

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Solution

The fourth proportional to 18,372.54, 27,558.20 and 7,984.30 is: 11,976.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.54 : 27,558.20 = 7,984.30 : x
  2. Step 2: Convert to fraction form
    18,372.54/27,558.20 = 7,984.30/x
  3. Step 3: Cross multiply
    18,372.54x = 27,558.20 × 7,984.30
  4. Step 4: Simplify right side
    18,372.54x = 220,032,936.26
  5. Step 5: Solve for x
    x = 220,032,936.26/18,372.54
  6. Step 6: Final answer
    x = 11,976.18

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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.