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Finding the Fourth Proportional to 29,318.87, 43,978.31 and 11,784.60

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Solution

The fourth proportional to 29,318.87, 43,978.31 and 11,784.60 is: 17,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,318.87 : 43,978.31 = 11,784.60 : x
  2. Step 2: Convert to fraction form
    29,318.87/43,978.31 = 11,784.60/x
  3. Step 3: Cross multiply
    29,318.87x = 43,978.31 × 11,784.60
  4. Step 4: Simplify right side
    29,318.87x = 518,266,792.03
  5. Step 5: Solve for x
    x = 518,266,792.03/29,318.87
  6. Step 6: Final answer
    x = 17,676.90

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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.