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Finding the Fourth Proportional to 28,003.60, 41,956.80 and 18,137.80

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Solution

The fourth proportional to 28,003.60, 41,956.80 and 18,137.80 is: 27,175.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003.60 : 41,956.80 = 18,137.80 : x
  2. Step 2: Convert to fraction form
    28,003.60/41,956.80 = 18,137.80/x
  3. Step 3: Cross multiply
    28,003.60x = 41,956.80 × 18,137.80
  4. Step 4: Simplify right side
    28,003.60x = 761,004,047.04
  5. Step 5: Solve for x
    x = 761,004,047.04/28,003.60
  6. Step 6: Final answer
    x = 27,175.22

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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.