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Finding the Fourth Proportional to 13,665.43, 18,858.48 and 8,003.47

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Solution

The fourth proportional to 13,665.43, 18,858.48 and 8,003.47 is: 11,044.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.43 : 18,858.48 = 8,003.47 : x
  2. Step 2: Convert to fraction form
    13,665.43/18,858.48 = 8,003.47/x
  3. Step 3: Cross multiply
    13,665.43x = 18,858.48 × 8,003.47
  4. Step 4: Simplify right side
    13,665.43x = 150,933,278.93
  5. Step 5: Solve for x
    x = 150,933,278.93/13,665.43
  6. Step 6: Final answer
    x = 11,044.90

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1.5x scale

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.