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Finding the Fourth Proportional to 9,636.80, 14,455.20 and 9,218.60

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Solution

The fourth proportional to 9,636.80, 14,455.20 and 9,218.60 is: 13,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,636.80 : 14,455.20 = 9,218.60 : x
  2. Step 2: Convert to fraction form
    9,636.80/14,455.20 = 9,218.60/x
  3. Step 3: Cross multiply
    9,636.80x = 14,455.20 × 9,218.60
  4. Step 4: Simplify right side
    9,636.80x = 133,256,706.72
  5. Step 5: Solve for x
    x = 133,256,706.72/9,636.80
  6. Step 6: Final answer
    x = 13,827.90

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Similar ratio
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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.