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Finding the Fourth Proportional to 13,551.78, 18,701.82 and 7,584.48

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Solution

The fourth proportional to 13,551.78, 18,701.82 and 7,584.48 is: 10,466.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,551.78 : 18,701.82 = 7,584.48 : x
  2. Step 2: Convert to fraction form
    13,551.78/18,701.82 = 7,584.48/x
  3. Step 3: Cross multiply
    13,551.78x = 18,701.82 × 7,584.48
  4. Step 4: Simplify right side
    13,551.78x = 141,843,579.75
  5. Step 5: Solve for x
    x = 141,843,579.75/13,551.78
  6. Step 6: Final answer
    x = 10,466.79

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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.