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Finding the Fourth Proportional to 28,558.90, 42,834.30 and 8,839.45

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Solution

The fourth proportional to 28,558.90, 42,834.30 and 8,839.45 is: 13,257.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,558.90 : 42,834.30 = 8,839.45 : x
  2. Step 2: Convert to fraction form
    28,558.90/42,834.30 = 8,839.45/x
  3. Step 3: Cross multiply
    28,558.90x = 42,834.30 × 8,839.45
  4. Step 4: Simplify right side
    28,558.90x = 378,631,653.14
  5. Step 5: Solve for x
    x = 378,631,653.14/28,558.90
  6. Step 6: Final answer
    x = 13,257.92

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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.