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Finding the Fourth Proportional to 14,122.56, 21,163.68 and 7,201.92

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Solution

The fourth proportional to 14,122.56, 21,163.68 and 7,201.92 is: 10,792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,122.56 : 21,163.68 = 7,201.92 : x
  2. Step 2: Convert to fraction form
    14,122.56/21,163.68 = 7,201.92/x
  3. Step 3: Cross multiply
    14,122.56x = 21,163.68 × 7,201.92
  4. Step 4: Simplify right side
    14,122.56x = 152,419,130.27
  5. Step 5: Solve for x
    x = 152,419,130.27/14,122.56
  6. Step 6: Final answer
    x = 10,792.60

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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.