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Finding the Fourth Proportional to 9,429.60, 14,115.60 and 8,392.80

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Solution

The fourth proportional to 9,429.60, 14,115.60 and 8,392.80 is: 12,563.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,429.60 : 14,115.60 = 8,392.80 : x
  2. Step 2: Convert to fraction form
    9,429.60/14,115.60 = 8,392.80/x
  3. Step 3: Cross multiply
    9,429.60x = 14,115.60 × 8,392.80
  4. Step 4: Simplify right side
    9,429.60x = 118,469,407.68
  5. Step 5: Solve for x
    x = 118,469,407.68/9,429.60
  6. Step 6: Final answer
    x = 12,563.57

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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.