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Finding the Fourth Proportional to 28,918.80, 43,360.60 and 11,367.60

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Solution

The fourth proportional to 28,918.80, 43,360.60 and 11,367.60 is: 17,044.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.80 : 43,360.60 = 11,367.60 : x
  2. Step 2: Convert to fraction form
    28,918.80/43,360.60 = 11,367.60/x
  3. Step 3: Cross multiply
    28,918.80x = 43,360.60 × 11,367.60
  4. Step 4: Simplify right side
    28,918.80x = 492,905,956.56
  5. Step 5: Solve for x
    x = 492,905,956.56/28,918.80
  6. Step 6: Final answer
    x = 17,044.48

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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.