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Finding the Fourth Proportional to 18,579, 25,642.26 and 11,127

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Solution

The fourth proportional to 18,579, 25,642.26 and 11,127 is: 15,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,579 : 25,642.26 = 11,127 : x
  2. Step 2: Convert to fraction form
    18,579/25,642.26 = 11,127/x
  3. Step 3: Cross multiply
    18,579x = 25,642.26 × 11,127
  4. Step 4: Simplify right side
    18,579x = 285,321,427.02
  5. Step 5: Solve for x
    x = 285,321,427.02/18,579
  6. Step 6: Final answer
    x = 15,357.20

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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.