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Finding the Fourth Proportional to 12,154.54, 18,229.05 and 7,936.45

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Solution

The fourth proportional to 12,154.54, 18,229.05 and 7,936.45 is: 11,902.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.54 : 18,229.05 = 7,936.45 : x
  2. Step 2: Convert to fraction form
    12,154.54/18,229.05 = 7,936.45/x
  3. Step 3: Cross multiply
    12,154.54x = 18,229.05 × 7,936.45
  4. Step 4: Simplify right side
    12,154.54x = 144,673,943.87
  5. Step 5: Solve for x
    x = 144,673,943.87/12,154.54
  6. Step 6: Final answer
    x = 11,902.87

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1.5x scale

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.