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Finding the Fourth Proportional to 13,615.62, 20,416.02 and 4,251.60

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Solution

The fourth proportional to 13,615.62, 20,416.02 and 4,251.60 is: 6,375.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.62 : 20,416.02 = 4,251.60 : x
  2. Step 2: Convert to fraction form
    13,615.62/20,416.02 = 4,251.60/x
  3. Step 3: Cross multiply
    13,615.62x = 20,416.02 × 4,251.60
  4. Step 4: Simplify right side
    13,615.62x = 86,800,750.63
  5. Step 5: Solve for x
    x = 86,800,750.63/13,615.62
  6. Step 6: Final answer
    x = 6,375.09

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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.