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Finding the Fourth Proportional to 13,909.98, 20,864.97 and 3,522.54

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Solution

The fourth proportional to 13,909.98, 20,864.97 and 3,522.54 is: 5,283.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.98 : 20,864.97 = 3,522.54 : x
  2. Step 2: Convert to fraction form
    13,909.98/20,864.97 = 3,522.54/x
  3. Step 3: Cross multiply
    13,909.98x = 20,864.97 × 3,522.54
  4. Step 4: Simplify right side
    13,909.98x = 73,497,691.42
  5. Step 5: Solve for x
    x = 73,497,691.42/13,909.98
  6. Step 6: Final answer
    x = 5,283.81

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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.