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Finding the Fourth Proportional to 11,815.60, 17,723.40 and 9,936.40

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Solution

The fourth proportional to 11,815.60, 17,723.40 and 9,936.40 is: 14,904.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,815.60 : 17,723.40 = 9,936.40 : x
  2. Step 2: Convert to fraction form
    11,815.60/17,723.40 = 9,936.40/x
  3. Step 3: Cross multiply
    11,815.60x = 17,723.40 × 9,936.40
  4. Step 4: Simplify right side
    11,815.60x = 176,106,791.76
  5. Step 5: Solve for x
    x = 176,106,791.76/11,815.60
  6. Step 6: Final answer
    x = 14,904.60

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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.