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Finding the Fourth Proportional to 18,087.64, 27,128.64 and 4,941.08

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Solution

The fourth proportional to 18,087.64, 27,128.64 and 4,941.08 is: 7,410.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,087.64 : 27,128.64 = 4,941.08 : x
  2. Step 2: Convert to fraction form
    18,087.64/27,128.64 = 4,941.08/x
  3. Step 3: Cross multiply
    18,087.64x = 27,128.64 × 4,941.08
  4. Step 4: Simplify right side
    18,087.64x = 134,044,780.53
  5. Step 5: Solve for x
    x = 134,044,780.53/18,087.64
  6. Step 6: Final answer
    x = 7,410.85

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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.