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Finding the Fourth Proportional to 29,670.60, 44,489.70 and 12,120.60

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Solution

The fourth proportional to 29,670.60, 44,489.70 and 12,120.60 is: 18,174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,670.60 : 44,489.70 = 12,120.60 : x
  2. Step 2: Convert to fraction form
    29,670.60/44,489.70 = 12,120.60/x
  3. Step 3: Cross multiply
    29,670.60x = 44,489.70 × 12,120.60
  4. Step 4: Simplify right side
    29,670.60x = 539,241,857.82
  5. Step 5: Solve for x
    x = 539,241,857.82/29,670.60
  6. Step 6: Final answer
    x = 18,174.28

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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.