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Finding the Fourth Proportional to 16,440, 22,687.38 and 8,988

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Solution

The fourth proportional to 16,440, 22,687.38 and 8,988 is: 12,403.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,440 : 22,687.38 = 8,988 : x
  2. Step 2: Convert to fraction form
    16,440/22,687.38 = 8,988/x
  3. Step 3: Cross multiply
    16,440x = 22,687.38 × 8,988
  4. Step 4: Simplify right side
    16,440x = 203,914,171.44
  5. Step 5: Solve for x
    x = 203,914,171.44/16,440
  6. Step 6: Final answer
    x = 12,403.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.