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Finding the Fourth Proportional to 18,201.78, 27,285.66 and 9,869.58

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Solution

The fourth proportional to 18,201.78, 27,285.66 and 9,869.58 is: 14,795.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,201.78 : 27,285.66 = 9,869.58 : x
  2. Step 2: Convert to fraction form
    18,201.78/27,285.66 = 9,869.58/x
  3. Step 3: Cross multiply
    18,201.78x = 27,285.66 × 9,869.58
  4. Step 4: Simplify right side
    18,201.78x = 269,298,004.22
  5. Step 5: Solve for x
    x = 269,298,004.22/18,201.78
  6. Step 6: Final answer
    x = 14,795.15

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1.5x scale

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.