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Finding the Fourth Proportional to 18,118.44, 25,005.06 and 10,665

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Solution

The fourth proportional to 18,118.44, 25,005.06 and 10,665 is: 14,718.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.44 : 25,005.06 = 10,665 : x
  2. Step 2: Convert to fraction form
    18,118.44/25,005.06 = 10,665/x
  3. Step 3: Cross multiply
    18,118.44x = 25,005.06 × 10,665
  4. Step 4: Simplify right side
    18,118.44x = 266,678,964.90
  5. Step 5: Solve for x
    x = 266,678,964.90/18,118.44
  6. Step 6: Final answer
    x = 14,718.65

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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.