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Finding the Fourth Proportional to 13,717.80, 20,576.70 and 13,069.80

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Solution

The fourth proportional to 13,717.80, 20,576.70 and 13,069.80 is: 19,604.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,717.80 : 20,576.70 = 13,069.80 : x
  2. Step 2: Convert to fraction form
    13,717.80/20,576.70 = 13,069.80/x
  3. Step 3: Cross multiply
    13,717.80x = 20,576.70 × 13,069.80
  4. Step 4: Simplify right side
    13,717.80x = 268,933,353.66
  5. Step 5: Solve for x
    x = 268,933,353.66/13,717.80
  6. Step 6: Final answer
    x = 19,604.70

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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.