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Finding the Fourth Proportional to 28,991.58, 43,487.68 and 9,269.70

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Solution

The fourth proportional to 28,991.58, 43,487.68 and 9,269.70 is: 13,904.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.58 : 43,487.68 = 9,269.70 : x
  2. Step 2: Convert to fraction form
    28,991.58/43,487.68 = 9,269.70/x
  3. Step 3: Cross multiply
    28,991.58x = 43,487.68 × 9,269.70
  4. Step 4: Simplify right side
    28,991.58x = 403,117,747.30
  5. Step 5: Solve for x
    x = 403,117,747.30/28,991.58
  6. Step 6: Final answer
    x = 13,904.65

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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.