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Finding the Fourth Proportional to 15,999.20, 23,998.80 and 5,609.60

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Solution

The fourth proportional to 15,999.20, 23,998.80 and 5,609.60 is: 8,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.20 : 23,998.80 = 5,609.60 : x
  2. Step 2: Convert to fraction form
    15,999.20/23,998.80 = 5,609.60/x
  3. Step 3: Cross multiply
    15,999.20x = 23,998.80 × 5,609.60
  4. Step 4: Simplify right side
    15,999.20x = 134,623,668.48
  5. Step 5: Solve for x
    x = 134,623,668.48/15,999.20
  6. Step 6: Final answer
    x = 8,414.40

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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.