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Finding the Fourth Proportional to 8,665.89, 12,989.32 and 3,399.32

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Solution

The fourth proportional to 8,665.89, 12,989.32 and 3,399.32 is: 5,095.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.89 : 12,989.32 = 3,399.32 : x
  2. Step 2: Convert to fraction form
    8,665.89/12,989.32 = 3,399.32/x
  3. Step 3: Cross multiply
    8,665.89x = 12,989.32 × 3,399.32
  4. Step 4: Simplify right side
    8,665.89x = 44,154,781.82
  5. Step 5: Solve for x
    x = 44,154,781.82/8,665.89
  6. Step 6: Final answer
    x = 5,095.24

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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.