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Finding the Fourth Proportional to 18,388.71, 27,579.40 and 5,058.25

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Solution

The fourth proportional to 18,388.71, 27,579.40 and 5,058.25 is: 7,586.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.71 : 27,579.40 = 5,058.25 : x
  2. Step 2: Convert to fraction form
    18,388.71/27,579.40 = 5,058.25/x
  3. Step 3: Cross multiply
    18,388.71x = 27,579.40 × 5,058.25
  4. Step 4: Simplify right side
    18,388.71x = 139,503,500.05
  5. Step 5: Solve for x
    x = 139,503,500.05/18,388.71
  6. Step 6: Final answer
    x = 7,586.37

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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.