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Finding the Fourth Proportional to 13,673.70, 20,515.10 and 4,909.30

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Solution

The fourth proportional to 13,673.70, 20,515.10 and 4,909.30 is: 7,365.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,673.70 : 20,515.10 = 4,909.30 : x
  2. Step 2: Convert to fraction form
    13,673.70/20,515.10 = 4,909.30/x
  3. Step 3: Cross multiply
    13,673.70x = 20,515.10 × 4,909.30
  4. Step 4: Simplify right side
    13,673.70x = 100,714,780.43
  5. Step 5: Solve for x
    x = 100,714,780.43/13,673.70
  6. Step 6: Final answer
    x = 7,365.58

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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.