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Finding the Fourth Proportional to 29,120.40, 43,664.40 and 12,477.60

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Solution

The fourth proportional to 29,120.40, 43,664.40 and 12,477.60 is: 18,709.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,120.40 : 43,664.40 = 12,477.60 : x
  2. Step 2: Convert to fraction form
    29,120.40/43,664.40 = 12,477.60/x
  3. Step 3: Cross multiply
    29,120.40x = 43,664.40 × 12,477.60
  4. Step 4: Simplify right side
    29,120.40x = 544,826,917.44
  5. Step 5: Solve for x
    x = 544,826,917.44/29,120.40
  6. Step 6: Final answer
    x = 18,709.46

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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.