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Finding the Fourth Proportional to 13,851.11, 20,763.86 and 5,529.11

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Solution

The fourth proportional to 13,851.11, 20,763.86 and 5,529.11 is: 8,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,851.11 : 20,763.86 = 5,529.11 : x
  2. Step 2: Convert to fraction form
    13,851.11/20,763.86 = 5,529.11/x
  3. Step 3: Cross multiply
    13,851.11x = 20,763.86 × 5,529.11
  4. Step 4: Simplify right side
    13,851.11x = 114,805,534.50
  5. Step 5: Solve for x
    x = 114,805,534.50/13,851.11
  6. Step 6: Final answer
    x = 8,288.55

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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.