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Finding the Fourth Proportional to 18,758.58, 28,129.56 and 5,608.50

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Solution

The fourth proportional to 18,758.58, 28,129.56 and 5,608.50 is: 8,410.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.58 : 28,129.56 = 5,608.50 : x
  2. Step 2: Convert to fraction form
    18,758.58/28,129.56 = 5,608.50/x
  3. Step 3: Cross multiply
    18,758.58x = 28,129.56 × 5,608.50
  4. Step 4: Simplify right side
    18,758.58x = 157,764,637.26
  5. Step 5: Solve for x
    x = 157,764,637.26/18,758.58
  6. Step 6: Final answer
    x = 8,410.27

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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.