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Finding the Fourth Proportional to 11,978.28, 18,007.96 and 9,654.60

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Solution

The fourth proportional to 11,978.28, 18,007.96 and 9,654.60 is: 14,514.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978.28 : 18,007.96 = 9,654.60 : x
  2. Step 2: Convert to fraction form
    11,978.28/18,007.96 = 9,654.60/x
  3. Step 3: Cross multiply
    11,978.28x = 18,007.96 × 9,654.60
  4. Step 4: Simplify right side
    11,978.28x = 173,859,650.62
  5. Step 5: Solve for x
    x = 173,859,650.62/11,978.28
  6. Step 6: Final answer
    x = 14,514.58

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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.