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Finding the Fourth Proportional to 28,690.45, 43,035.71 and 8,969.11

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Solution

The fourth proportional to 28,690.45, 43,035.71 and 8,969.11 is: 13,453.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.45 : 43,035.71 = 8,969.11 : x
  2. Step 2: Convert to fraction form
    28,690.45/43,035.71 = 8,969.11/x
  3. Step 3: Cross multiply
    28,690.45x = 43,035.71 × 8,969.11
  4. Step 4: Simplify right side
    28,690.45x = 385,992,016.92
  5. Step 5: Solve for x
    x = 385,992,016.92/28,690.45
  6. Step 6: Final answer
    x = 13,453.68

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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.