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Finding the Fourth Proportional to 28,394.48, 42,591.72 and 7,618.52

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Solution

The fourth proportional to 28,394.48, 42,591.72 and 7,618.52 is: 11,427.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,394.48 : 42,591.72 = 7,618.52 : x
  2. Step 2: Convert to fraction form
    28,394.48/42,591.72 = 7,618.52/x
  3. Step 3: Cross multiply
    28,394.48x = 42,591.72 × 7,618.52
  4. Step 4: Simplify right side
    28,394.48x = 324,485,870.65
  5. Step 5: Solve for x
    x = 324,485,870.65/28,394.48
  6. Step 6: Final answer
    x = 11,427.78

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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.