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Finding the Fourth Proportional to 8,991.74, 13,489.81 and 4,538.45

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Solution

The fourth proportional to 8,991.74, 13,489.81 and 4,538.45 is: 6,808.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.74 : 13,489.81 = 4,538.45 : x
  2. Step 2: Convert to fraction form
    8,991.74/13,489.81 = 4,538.45/x
  3. Step 3: Cross multiply
    8,991.74x = 13,489.81 × 4,538.45
  4. Step 4: Simplify right side
    8,991.74x = 61,222,850.57
  5. Step 5: Solve for x
    x = 61,222,850.57/8,991.74
  6. Step 6: Final answer
    x = 6,808.79

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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.