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Finding the Fourth Proportional to 18,999.46, 28,483.83 and 7,914.47

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Solution

The fourth proportional to 18,999.46, 28,483.83 and 7,914.47 is: 11,865.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.46 : 28,483.83 = 7,914.47 : x
  2. Step 2: Convert to fraction form
    18,999.46/28,483.83 = 7,914.47/x
  3. Step 3: Cross multiply
    18,999.46x = 28,483.83 × 7,914.47
  4. Step 4: Simplify right side
    18,999.46x = 225,434,378.45
  5. Step 5: Solve for x
    x = 225,434,378.45/18,999.46
  6. Step 6: Final answer
    x = 11,865.31

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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.