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Finding the Fourth Proportional to 13,479.60, 20,212.20 and 4,714.80

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Solution

The fourth proportional to 13,479.60, 20,212.20 and 4,714.80 is: 7,069.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.60 : 20,212.20 = 4,714.80 : x
  2. Step 2: Convert to fraction form
    13,479.60/20,212.20 = 4,714.80/x
  3. Step 3: Cross multiply
    13,479.60x = 20,212.20 × 4,714.80
  4. Step 4: Simplify right side
    13,479.60x = 95,296,480.56
  5. Step 5: Solve for x
    x = 95,296,480.56/13,479.60
  6. Step 6: Final answer
    x = 7,069.68

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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.