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Finding the Fourth Proportional to 18,391.40, 27,584.00 and 5,240.64

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Solution

The fourth proportional to 18,391.40, 27,584.00 and 5,240.64 is: 7,860.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.40 : 27,584.00 = 5,240.64 : x
  2. Step 2: Convert to fraction form
    18,391.40/27,584.00 = 5,240.64/x
  3. Step 3: Cross multiply
    18,391.40x = 27,584.00 × 5,240.64
  4. Step 4: Simplify right side
    18,391.40x = 144,557,826.86
  5. Step 5: Solve for x
    x = 144,557,826.86/18,391.40
  6. Step 6: Final answer
    x = 7,860.08

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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.