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Finding the Fourth Proportional to 28,558.58, 42,839.69 and 8,835.48

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Solution

The fourth proportional to 28,558.58, 42,839.69 and 8,835.48 is: 13,253.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,558.58 : 42,839.69 = 8,835.48 : x
  2. Step 2: Convert to fraction form
    28,558.58/42,839.69 = 8,835.48/x
  3. Step 3: Cross multiply
    28,558.58x = 42,839.69 × 8,835.48
  4. Step 4: Simplify right side
    28,558.58x = 378,509,180.02
  5. Step 5: Solve for x
    x = 378,509,180.02/28,558.58
  6. Step 6: Final answer
    x = 13,253.78

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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.