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Finding the Fourth Proportional to 18,445.68, 27,665.10 and 7,917.57

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Solution

The fourth proportional to 18,445.68, 27,665.10 and 7,917.57 is: 11,874.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,445.68 : 27,665.10 = 7,917.57 : x
  2. Step 2: Convert to fraction form
    18,445.68/27,665.10 = 7,917.57/x
  3. Step 3: Cross multiply
    18,445.68x = 27,665.10 × 7,917.57
  4. Step 4: Simplify right side
    18,445.68x = 219,040,365.81
  5. Step 5: Solve for x
    x = 219,040,365.81/18,445.68
  6. Step 6: Final answer
    x = 11,874.89

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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.