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Finding the Fourth Proportional to 18,560, 25,612.88 and 11,108

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Solution

The fourth proportional to 18,560, 25,612.88 and 11,108 is: 15,329.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,560 : 25,612.88 = 11,108 : x
  2. Step 2: Convert to fraction form
    18,560/25,612.88 = 11,108/x
  3. Step 3: Cross multiply
    18,560x = 25,612.88 × 11,108
  4. Step 4: Simplify right side
    18,560x = 284,507,871.04
  5. Step 5: Solve for x
    x = 284,507,871.04/18,560
  6. Step 6: Final answer
    x = 15,329.09

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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.