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Finding the Fourth Proportional to 13,709.71, 18,919.54 and 8,044.56

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Solution

The fourth proportional to 13,709.71, 18,919.54 and 8,044.56 is: 11,101.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.71 : 18,919.54 = 8,044.56 : x
  2. Step 2: Convert to fraction form
    13,709.71/18,919.54 = 8,044.56/x
  3. Step 3: Cross multiply
    13,709.71x = 18,919.54 × 8,044.56
  4. Step 4: Simplify right side
    13,709.71x = 152,199,374.70
  5. Step 5: Solve for x
    x = 152,199,374.70/13,709.71
  6. Step 6: Final answer
    x = 11,101.58

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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.