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Finding the Fourth Proportional to 7,474.60, 11,187.60 and 5,287.60

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Solution

The fourth proportional to 7,474.60, 11,187.60 and 5,287.60 is: 7,914.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,474.60 : 11,187.60 = 5,287.60 : x
  2. Step 2: Convert to fraction form
    7,474.60/11,187.60 = 5,287.60/x
  3. Step 3: Cross multiply
    7,474.60x = 11,187.60 × 5,287.60
  4. Step 4: Simplify right side
    7,474.60x = 59,155,553.76
  5. Step 5: Solve for x
    x = 59,155,553.76/7,474.60
  6. Step 6: Final answer
    x = 7,914.21

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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.