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Finding the Fourth Proportional to 13,505.25, 20,257.97 and 4,271.25

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Solution

The fourth proportional to 13,505.25, 20,257.97 and 4,271.25 is: 6,406.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,505.25 : 20,257.97 = 4,271.25 : x
  2. Step 2: Convert to fraction form
    13,505.25/20,257.97 = 4,271.25/x
  3. Step 3: Cross multiply
    13,505.25x = 20,257.97 × 4,271.25
  4. Step 4: Simplify right side
    13,505.25x = 86,526,833.01
  5. Step 5: Solve for x
    x = 86,526,833.01/13,505.25
  6. Step 6: Final answer
    x = 6,406.90

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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.