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Finding the Fourth Proportional to 13,487.00, 20,238.39 and 8,538.71

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Solution

The fourth proportional to 13,487.00, 20,238.39 and 8,538.71 is: 12,813.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.00 : 20,238.39 = 8,538.71 : x
  2. Step 2: Convert to fraction form
    13,487.00/20,238.39 = 8,538.71/x
  3. Step 3: Cross multiply
    13,487.00x = 20,238.39 × 8,538.71
  4. Step 4: Simplify right side
    13,487.00x = 172,809,641.88
  5. Step 5: Solve for x
    x = 172,809,641.88/13,487.00
  6. Step 6: Final answer
    x = 12,813.06

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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.