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Finding the Fourth Proportional to 13,474.60, 20,211.90 and 11,287.60

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Solution

The fourth proportional to 13,474.60, 20,211.90 and 11,287.60 is: 16,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,474.60 : 20,211.90 = 11,287.60 : x
  2. Step 2: Convert to fraction form
    13,474.60/20,211.90 = 11,287.60/x
  3. Step 3: Cross multiply
    13,474.60x = 20,211.90 × 11,287.60
  4. Step 4: Simplify right side
    13,474.60x = 228,143,842.44
  5. Step 5: Solve for x
    x = 228,143,842.44/13,474.60
  6. Step 6: Final answer
    x = 16,931.40

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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.