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Finding the Fourth Proportional to 13,805.97, 20,711.52 and 12,553.98

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Solution

The fourth proportional to 13,805.97, 20,711.52 and 12,553.98 is: 18,833.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,805.97 : 20,711.52 = 12,553.98 : x
  2. Step 2: Convert to fraction form
    13,805.97/20,711.52 = 12,553.98/x
  3. Step 3: Cross multiply
    13,805.97x = 20,711.52 × 12,553.98
  4. Step 4: Simplify right side
    13,805.97x = 260,012,007.85
  5. Step 5: Solve for x
    x = 260,012,007.85/13,805.97
  6. Step 6: Final answer
    x = 18,833.30

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1.5x scale

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.