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Finding the Fourth Proportional to 28,690.64, 43,035.99 and 8,969.30

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Solution

The fourth proportional to 28,690.64, 43,035.99 and 8,969.30 is: 13,453.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.64 : 43,035.99 = 8,969.30 : x
  2. Step 2: Convert to fraction form
    28,690.64/43,035.99 = 8,969.30/x
  3. Step 3: Cross multiply
    28,690.64x = 43,035.99 × 8,969.30
  4. Step 4: Simplify right side
    28,690.64x = 386,002,705.11
  5. Step 5: Solve for x
    x = 386,002,705.11/28,690.64
  6. Step 6: Final answer
    x = 13,453.96

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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.