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Finding the Fourth Proportional to 9,991.60, 14,975.73 and 7,518.47

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Solution

The fourth proportional to 9,991.60, 14,975.73 and 7,518.47 is: 11,268.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.60 : 14,975.73 = 7,518.47 : x
  2. Step 2: Convert to fraction form
    9,991.60/14,975.73 = 7,518.47/x
  3. Step 3: Cross multiply
    9,991.60x = 14,975.73 × 7,518.47
  4. Step 4: Simplify right side
    9,991.60x = 112,594,576.73
  5. Step 5: Solve for x
    x = 112,594,576.73/9,991.60
  6. Step 6: Final answer
    x = 11,268.92

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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.