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Finding the Fourth Proportional to 18,835.92, 25,997.04 and 12,120.48

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Solution

The fourth proportional to 18,835.92, 25,997.04 and 12,120.48 is: 16,728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835.92 : 25,997.04 = 12,120.48 : x
  2. Step 2: Convert to fraction form
    18,835.92/25,997.04 = 12,120.48/x
  3. Step 3: Cross multiply
    18,835.92x = 25,997.04 × 12,120.48
  4. Step 4: Simplify right side
    18,835.92x = 315,096,603.38
  5. Step 5: Solve for x
    x = 315,096,603.38/18,835.92
  6. Step 6: Final answer
    x = 16,728.50

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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.