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Finding the Fourth Proportional to 13,792.76, 20,691 and 4,429.66

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Solution

The fourth proportional to 13,792.76, 20,691 and 4,429.66 is: 6,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,792.76 : 20,691 = 4,429.66 : x
  2. Step 2: Convert to fraction form
    13,792.76/20,691 = 4,429.66/x
  3. Step 3: Cross multiply
    13,792.76x = 20,691 × 4,429.66
  4. Step 4: Simplify right side
    13,792.76x = 91,654,095.06
  5. Step 5: Solve for x
    x = 91,654,095.06/13,792.76
  6. Step 6: Final answer
    x = 6,645.09

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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.