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Finding the Fourth Proportional to 18,273.50, 25,217.44 and 9,890

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Solution

The fourth proportional to 18,273.50, 25,217.44 and 9,890 is: 13,648.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,273.50 : 25,217.44 = 9,890 : x
  2. Step 2: Convert to fraction form
    18,273.50/25,217.44 = 9,890/x
  3. Step 3: Cross multiply
    18,273.50x = 25,217.44 × 9,890
  4. Step 4: Simplify right side
    18,273.50x = 249,400,481.60
  5. Step 5: Solve for x
    x = 249,400,481.60/18,273.50
  6. Step 6: Final answer
    x = 13,648.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.