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Finding the Fourth Proportional to 18,204.62, 25,123.38 and 11,129

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Solution

The fourth proportional to 18,204.62, 25,123.38 and 11,129 is: 15,358.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,204.62 : 25,123.38 = 11,129 : x
  2. Step 2: Convert to fraction form
    18,204.62/25,123.38 = 11,129/x
  3. Step 3: Cross multiply
    18,204.62x = 25,123.38 × 11,129
  4. Step 4: Simplify right side
    18,204.62x = 279,598,096.02
  5. Step 5: Solve for x
    x = 279,598,096.02/18,204.62
  6. Step 6: Final answer
    x = 15,358.63

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1.5x scale

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.