Home / 13,425.12-20,137.68-5,103.20

Finding the Fourth Proportional to 13,425.12, 20,137.68 and 5,103.20

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Solution

The fourth proportional to 13,425.12, 20,137.68 and 5,103.20 is: 7,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.12 : 20,137.68 = 5,103.20 : x
  2. Step 2: Convert to fraction form
    13,425.12/20,137.68 = 5,103.20/x
  3. Step 3: Cross multiply
    13,425.12x = 20,137.68 × 5,103.20
  4. Step 4: Simplify right side
    13,425.12x = 102,766,608.58
  5. Step 5: Solve for x
    x = 102,766,608.58/13,425.12
  6. Step 6: Final answer
    x = 7,654.80

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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.