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Finding the Fourth Proportional to 13,838.45, 20,763.75 and 7,263.11

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Solution

The fourth proportional to 13,838.45, 20,763.75 and 7,263.11 is: 10,897.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,838.45 : 20,763.75 = 7,263.11 : x
  2. Step 2: Convert to fraction form
    13,838.45/20,763.75 = 7,263.11/x
  3. Step 3: Cross multiply
    13,838.45x = 20,763.75 × 7,263.11
  4. Step 4: Simplify right side
    13,838.45x = 150,809,296.44
  5. Step 5: Solve for x
    x = 150,809,296.44/13,838.45
  6. Step 6: Final answer
    x = 10,897.85

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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.