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Finding the Fourth Proportional to 28,914.64, 43,359.72 and 9,187.90

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Solution

The fourth proportional to 28,914.64, 43,359.72 and 9,187.90 is: 13,777.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,914.64 : 43,359.72 = 9,187.90 : x
  2. Step 2: Convert to fraction form
    28,914.64/43,359.72 = 9,187.90/x
  3. Step 3: Cross multiply
    28,914.64x = 43,359.72 × 9,187.90
  4. Step 4: Simplify right side
    28,914.64x = 398,384,771.39
  5. Step 5: Solve for x
    x = 398,384,771.39/28,914.64
  6. Step 6: Final answer
    x = 13,777.96

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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.